FPUS56 KSGX 220655 ZFPSGX Zone Forecast Product for Extreme Southwest California National Weather Service San Diego CA 1155 PM PDT Fri Aug 21 2026 CAZ552-220815- Orange County Coastal Areas- Including the cities of Huntington Beach, Costa Mesa, Newport Beach, Laguna Beach, and San Clemente 1155 PM PDT Fri Aug 21 2026 .TODAY...Partly cloudy this morning...becoming mostly sunny. Highs around 80 at the beaches to 85 to 90 farther inland and near higher coastal terrain. Light winds becoming southwest 10 mph this afternoon. .TONIGHT...Partly cloudy. Lows 66 to 69. Areas of winds southwest to 10 mph in the evening becoming light. .SATURDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 78 to 83 at the beaches to 84 to 89 farther inland and near higher coastal terrain. Light winds becoming southwest 10 mph in the afternoon. .SATURDAY NIGHT...Mostly clear in the evening...becoming partly cloudy. Lows 66 to 69. Areas of winds southwest to 10 mph in the evening becoming light. .SUNDAY...Mostly sunny. Highs 78 to 83 at the beaches to 86 to 91 farther inland and near higher coastal terrain. Light winds becoming west 10 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 66 to 69. .MONDAY...Mostly sunny. Highs 79 to 84 at the beaches to 85 to 90 farther inland and near higher coastal terrain. .MONDAY NIGHT...Mostly clear. Lows around 70. .TUESDAY...Mostly sunny. Highs 80 to 85 at the beaches to 87 to 92 farther inland and near higher coastal terrain. .TUESDAY NIGHT...Mostly clear. Lows 69 to 72. .WEDNESDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 80 to 85 at the beaches to 89 to 94 farther inland and near higher coastal terrain. .WEDNESDAY NIGHT...Mostly clear. Lows 69 to 72. .THURSDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 80 to 85 at the beaches to 89 to 94 farther inland and near higher coastal terrain. $$ CAZ554-220815- Orange County Inland Areas- Including the cities of Santa Ana, Anaheim, Garden Grove, Irvine, Orange, Fullerton, and Mission Viejo 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Mostly sunny. Highs 85 to 88 towards the coast to 91 to 94 farther inland. Light winds becoming southwest 10 mph this afternoon. .TONIGHT...Partly cloudy. Lows 65 to 70. Areas of winds south to 10 mph in the evening becoming light. .SATURDAY...Mostly sunny. Highs 86 to 90 towards the coast to 93 to 96 farther inland. Light winds becoming southwest 10 mph in the afternoon. .SATURDAY NIGHT...Mostly clear. Lows 65 to 70. Light winds. .SUNDAY...Mostly sunny. Highs 88 to 92 towards the coast to 96 farther inland. Light winds becoming southwest 10 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 66 to 70. .MONDAY...Mostly sunny. Highs 88 to 92 towards the coast to 94 to 97 farther inland. .MONDAY NIGHT...Mostly clear. Lows 68 to 72. .TUESDAY...Mostly sunny. Highs 90 to 93 towards the coast to 96 to 99 farther inland. .TUESDAY NIGHT...Mostly clear. Lows 69 to 73. .WEDNESDAY...Mostly sunny. Highs 92 to 95 towards the coast to 100 farther inland. .WEDNESDAY NIGHT...Mostly clear. Lows 69 to 74. .THURSDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 91 to 96 towards the coast to 100 farther inland. $$ CAZ043-220815- San Diego County Coastal Areas- Including the cities of Oceanside, Vista, Carlsbad, Encinitas, Chula Vista, National City, and San Diego 1155 PM PDT Fri Aug 21 2026 .TODAY...Mostly sunny. Highs 77 to 82 near the coast to 86 to 90 inland. Light winds becoming west 10 mph this afternoon. .TONIGHT...Partly cloudy. Patchy fog overnight. Lows 65 to 70. Light winds. .SATURDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 78 to 83 near the coast to 85 to 90 inland. Light winds becoming west 10 mph in the afternoon. .SATURDAY NIGHT...Mostly clear in the evening...becoming partly cloudy. Lows 65 to 70. Light winds. .SUNDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 79 to 84 near the coast to 87 to 92 inland. Areas of winds west to 10 mph. .SUNDAY NIGHT...Mostly clear in the evening...becoming partly cloudy. Lows 66 to 70. .MONDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 79 to 84 near the coast to 86 to 91 inland. .MONDAY NIGHT...Mostly clear in the evening...becoming partly cloudy. Lows 67 to 71. .TUESDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 80 to 85 near the coast to 88 to 93 inland. .TUESDAY NIGHT...Mostly clear. Lows 67 to 72. .WEDNESDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 80 to 85 near the coast to 90 to 94 inland. .WEDNESDAY NIGHT...Mostly clear in the evening...becoming partly cloudy. Lows 68 to 72. .THURSDAY...Partly cloudy. Highs 80 to 85 near the coast to 91 to 95 inland. $$ CAZ050-220815- San Diego County Valleys- Including the cities of Escondido, El Cajon, San Marcos, La Mesa, Santee, and Poway 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Mostly sunny. Highs 89 to 94 in the western valleys to 94 to 99 near the foothills. Areas of winds west to 10 mph. .TONIGHT...Partly cloudy in the evening...becoming mostly clear. Lows 66 to 72. Areas of winds west to 10 mph in the evening becoming light. .SATURDAY...Mostly sunny. Highs 89 to 94 in the western valleys to 95 to 100 near the foothills. Areas of winds west to 10 mph. .SATURDAY NIGHT...Mostly clear. Lows 66 to 72. Areas of winds west to 10 mph in the evening becoming light. .SUNDAY...Mostly sunny. Highs 90 to 95 in the western valleys to 96 to 101 near the foothills. Light winds becoming west 10 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 67 to 72. .MONDAY...Mostly sunny. Highs 90 to 95 in the western valleys to 95 to 100 near the foothills. .MONDAY NIGHT...Mostly clear. Lows 67 to 72. .TUESDAY...Mostly sunny. Highs 91 to 96 in the western valleys to 96 to 101 near the foothills. .TUESDAY NIGHT...Mostly clear. Lows 68 to 73. .WEDNESDAY...Mostly sunny. Highs 93 to 98 in the western valleys to 97 to 102 near the foothills. .WEDNESDAY NIGHT...Mostly clear. Lows 69 to 74. .THURSDAY...Partly cloudy in the morning...becoming mostly sunny. Highs 97 to 102. $$ CAZ048-220815- San Bernardino and Riverside County Valleys-The Inland Empire- Including the cities of Riverside, San Bernardino, Ontario, Moreno Valley, Fontana, Rancho Cucamonga, and Corona 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Mostly sunny. Highs 97 to 103. Areas of winds southwest to 10 mph...becoming 10 to 15 mph with gusts to 25 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming mostly clear. Lows 67 to 72. Areas of winds southwest 10 to 15 mph with gusts to 25 mph in the evening becoming light. .SATURDAY...Sunny. Highs 99 to 105. Light winds becoming west 10 to 15 mph in the afternoon. .SATURDAY NIGHT...Clear. Lows 66 to 72. Areas of winds west to 10 mph in the evening becoming light. .SUNDAY...Mostly sunny. Highs 99 to 105. Light winds becoming west 10 to 15 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 67 to 72. .MONDAY...Mostly sunny. Highs 99 to 105. .MONDAY NIGHT...Mostly clear. Lows 67 to 72. .TUESDAY...Sunny. Highs 100 to 107. .TUESDAY NIGHT...Clear. Lows 69 to 73. .WEDNESDAY...Mostly sunny. Highs 101 to 107. .WEDNESDAY NIGHT...Mostly clear. Lows 70 to 73. .THURSDAY...Mostly sunny. Highs 101 to 107. $$ CAZ057-220815- Santa Ana Mountains and Foothills- 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Sunny. Highs 90 to 100. Areas of winds east to 10 mph becoming southwest with gusts to 25 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming mostly clear. Lows 65 to 74. Areas of winds southwest to 10 mph in the evening becoming light. .SATURDAY...Sunny. Highs 91 to 101. Light winds becoming west 10 mph in the afternoon. .SATURDAY NIGHT...Clear. Lows 65 to 74. Areas of winds west to 10 mph in the evening becoming light. .SUNDAY...Mostly sunny. Highs 92 to 102. Light winds becoming west 10 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 66 to 75. .MONDAY...Mostly sunny. Highs 92 to 102. .MONDAY NIGHT...Mostly clear. Lows 67 to 75. .TUESDAY...Sunny. Highs 94 to 104. .TUESDAY NIGHT...Clear. Lows 69 to 76. .WEDNESDAY...Mostly sunny. Highs 95 to 105. .WEDNESDAY NIGHT...Mostly clear. Lows 69 to 77. .THURSDAY...Mostly sunny. Highs 95 to 104. $$ CAZ055-220815- San Bernardino County Mountains- Including the cities of Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs, and Wrightwood 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Mostly sunny this morning, then partly cloudy with a slight chance of showers and thunderstorms this afternoon. Highs 75 to 85 above 6000 feet to 85 to 95 below 6000 feet. Areas of winds south 10 to 15 mph. Gusts to 30 mph this afternoon. Chance of measurable precipitation 20 percent. .TONIGHT...Partly cloudy in the evening...becoming mostly clear. Cooler. Lows 53 to 63 above 6000 feet to 62 to 72 below 6000 feet. Areas of winds south 10 to 15 mph. Gusts to 30 mph in the evening. .SATURDAY...Sunny. Highs 77 to 87 above 6000 feet to 86 to 96 below 6000 feet. Areas of winds south to 10 mph becoming southwest with gusts to 30 mph in the afternoon. .SATURDAY NIGHT...Clear. Lows 52 to 62 above 6000 feet to 61 to 71 below 6000 feet. Areas of winds southwest 10 to 15 mph. Gusts to 30 mph...becoming 25 mph overnight. .SUNDAY...Mostly sunny. Highs 76 to 86 above 6000 feet to 86 to 96 below 6000 feet. Areas of winds south 10 to 15 mph. Gusts to 25 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 56 to 66. .MONDAY...Mostly sunny. Highs 76 to 86 above 6000 feet to 86 to 95 below 6000 feet. .MONDAY NIGHT...Mostly clear. Lows 56 to 66. .TUESDAY...Mostly sunny. Highs 78 to 88 above 6000 feet to 87 to 97 below 6000 feet. .TUESDAY NIGHT...Mostly clear. Lows 56 to 66. .WEDNESDAY...Mostly sunny. Highs 79 to 89 above 6000 feet to 88 to 97 below 6000 feet. .WEDNESDAY NIGHT...Mostly clear. Lows 57 to 67. .THURSDAY...Mostly sunny. Highs 79 to 89 above 6000 feet to 88 to 97 below 6000 feet. $$ CAZ056-220815- Riverside County Mountains- Including the city of Idyllwild-Pine Cove 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Mostly sunny this morning...becoming partly cloudy. Highs 88 to 98. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming clear. Lows 60 to 70. Areas of winds west 10 to 15 mph. Gusts to 25 mph in the evening. .SATURDAY...Sunny. Highs 89 to 99. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph in the afternoon. .SATURDAY NIGHT...Clear. Lows 60 to 70. Areas of winds west 10 to 15 mph. Gusts to 25 mph in the evening. .SUNDAY...Mostly sunny. Highs 89 to 99. Areas of winds south to 10 mph becoming west 10 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 60 to 70. .MONDAY...Mostly sunny. Highs 87 to 97. .MONDAY NIGHT...Mostly clear. Lows 60 to 70. .TUESDAY...Mostly sunny. Highs 89 to 99. .TUESDAY NIGHT...Mostly clear. Lows 61 to 71. .WEDNESDAY...Mostly sunny. Highs 89 to 99. .WEDNESDAY NIGHT...Mostly clear. Lows 62 to 72. .THURSDAY...Mostly sunny. Highs 89 to 99. $$ CAZ058-220815- San Diego County Mountains- Including the cities of Julian and Pine Valley 1155 PM PDT Fri Aug 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY... .TODAY...Mostly sunny this morning...becoming partly cloudy. Highs 88 to 98. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming clear. Lows 65 to 75. Areas of winds west 10 to 15 mph with gusts to 25 mph. .SATURDAY...Sunny. Highs 91 to 100. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph in the afternoon. .SATURDAY NIGHT...Clear. Lows 64 to 74. Areas of winds west 10 to 15 mph. Gusts to 30 mph...becoming 25 mph overnight. .SUNDAY...Mostly sunny. Highs 91 to 100. Areas of winds southwest to 10 mph becoming west in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 64 to 74. .MONDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs 90 to 98. .MONDAY NIGHT...Mostly clear. Lows 65 to 75. .TUESDAY...Mostly sunny. Highs 91 to 100. .TUESDAY NIGHT...Mostly clear. Lows 66 to 76. .WEDNESDAY...Mostly sunny. Highs 93 to 101. .WEDNESDAY NIGHT...Mostly clear. Lows 66 to 76. .THURSDAY...Mostly sunny. Highs 93 to 101. $$ CAZ060-220815- Apple and Lucerne Valleys- Including the cities of Victorville, Hesperia, Apple Valley, and Lucerne Valley 1155 PM PDT Fri Aug 21 2026 .TODAY...Mostly sunny this morning, then partly cloudy with a slight chance of showers and thunderstorms this afternoon. Highs 99 to 104. Light winds becoming south 10 to 20 mph with gusts to 35 mph this afternoon. Chance of measurable precipitation 20 percent. .TONIGHT...Partly cloudy in the evening...becoming mostly clear. Cooler. Lows 68 to 77. Areas of winds west 10 to 20 mph. Gusts to 35 mph...becoming 25 mph overnight. .SATURDAY...Sunny. Highs 100 to 107. Areas of winds west to 10 mph...becoming south 10 to 20 mph with gusts to 30 mph in the afternoon. .SATURDAY NIGHT...Clear. Lows 67 to 75. Areas of winds west 10 to 20 mph. Gusts to 30 mph...becoming 25 mph overnight. .SUNDAY...Mostly sunny. Highs 100 to 107. Areas of winds southwest to 10 mph...becoming 10 to 20 mph with gusts to 30 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 66 to 76. .MONDAY...Mostly sunny. Highs 99 to 105. .MONDAY NIGHT...Mostly clear. Lows 67 to 76. .TUESDAY...Mostly sunny. Highs 100 to 106. .TUESDAY NIGHT...Mostly clear. Lows 68 to 77. .WEDNESDAY...Mostly sunny. Highs 100 to 106. .WEDNESDAY NIGHT...Mostly clear. Lows 68 to 76. .THURSDAY...Mostly sunny. Highs 101 to 107. $$ CAZ065-220815- San Gorgonio Pass near Banning- 1155 PM PDT Fri Aug 21 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny this morning...becoming partly cloudy. Highs 104 to 107 through the pass to 108 to 113 in the northern Coachella Valley. Areas of winds west 10 to 15 mph with gusts to 25 mph...becoming 15 to 25 mph with gusts to 35 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming mostly clear. Lows around 78 through the pass to 88 in the northern Coachella Valley. Areas of winds west 15 to 25 mph. Gusts to 40 mph... becoming 35 mph overnight. .SATURDAY...Sunny, hot. Highs around 106 through the pass to 110 to 114 in the northern Coachella Valley. Areas of winds west 10 to 20 mph. Gusts to 25 mph...becoming 30 mph in the afternoon. .SATURDAY NIGHT...Mostly clear. Lows around 78 through the pass to 86 to 89 in the northern Coachella Valley. Areas of winds west 15 to 25 mph. Gusts to 40 mph...becoming 35 mph overnight. .SUNDAY...Mostly sunny. Hot. Highs around 105 through the pass to 108 to 112 in the northern Coachella Valley. Areas of winds west 10 to 15 mph becoming south in the afternoon. Gusts to 25 mph. .SUNDAY NIGHT...Mostly clear. Lows 78 to 88. .MONDAY...Mostly sunny. Hot. Highs around 104 through the pass to 110 in the northern Coachella Valley. .MONDAY NIGHT...Mostly clear. Lows 78 to 87. .TUESDAY...Sunny, hot. Highs around 106 through the pass to 109 to 113 in the northern Coachella Valley. .TUESDAY NIGHT...Clear. Lows 79 to 88. .WEDNESDAY...Mostly sunny. Hot. Highs around 106 through the pass to 110 to 114 in the northern Coachella Valley. .WEDNESDAY NIGHT...Mostly clear. Breezy. Lows 79 to 88. .THURSDAY...Mostly sunny. Hot. Highs 105 to 108 through the pass to 110 to 113 in the northern Coachella Valley. $$ CAZ061-220815- Coachella Valley- Including the cities of Indio, Palm Springs, Cathedral City, Palm Desert, Palm Desert Country, La Quinta, and Coachella 1155 PM PDT Fri Aug 21 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny. Highs 110 to 114. Light winds becoming southeast 10 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming clear. Lows 85 to 89. Areas of winds northwest 10 to 15 mph. Gusts to 30 mph...becoming 25 mph overnight. .SATURDAY...Sunny. Very hot. Highs 112 to 115. Areas of winds northwest to 10 mph becoming southeast 10 mph in the afternoon. .SATURDAY NIGHT...Mostly clear. Lows 85 to 89. Areas of winds northwest 10 to 15 mph. Gusts to 25 mph in the evening. .SUNDAY...Mostly sunny. Hot. Highs 110 to 113. Areas of winds southeast to 10 mph...becoming 10 to 15 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 85 to 88. .MONDAY...Mostly sunny. Hot. Highs around 110. .MONDAY NIGHT...Mostly clear. Lows 84 to 88. .TUESDAY...Sunny, hot. Highs 110 to 113. .TUESDAY NIGHT...Mostly clear. Lows 85 to 89. .WEDNESDAY...Mostly sunny. Very hot. Highs 112 to 115. .WEDNESDAY NIGHT...Mostly clear. Lows 85 to 90. .THURSDAY...Mostly sunny. Hot. Highs around 113. $$ CAZ062-220815- San Diego County Deserts- Including the city of Borrego Springs 1155 PM PDT Fri Aug 21 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny this morning...becoming partly cloudy. Highs 110 to 114. Light winds becoming east 10 mph this afternoon. .TONIGHT...Partly cloudy in the evening...becoming clear. Lows 85 to 91. Areas of winds west 10 to 15 mph. Gusts to 30 mph... becoming 25 mph overnight. .SATURDAY...Mostly sunny. Very hot. Highs 112 to 116. Areas of winds east to 10 mph...becoming 10 to 15 mph with gusts to 25 mph in the afternoon. .SATURDAY NIGHT...Mostly clear. Lows 84 to 90. Areas of winds west 10 to 15 mph. Gusts to 30 mph...becoming 25 mph overnight. .SUNDAY...Mostly sunny. Very hot. Highs 110 to 115. Areas of winds east to 10 mph becoming southeast with gusts to 30 mph in the afternoon. .SUNDAY NIGHT...Mostly clear. Lows 83 to 90. .MONDAY...Mostly sunny. Hot. Highs 108 to 112. .MONDAY NIGHT...Mostly clear. Lows 84 to 90. .TUESDAY...Sunny, hot. Highs 110 to 114. .TUESDAY NIGHT...Mostly clear. Lows 85 to 91. .WEDNESDAY...Mostly sunny. Very hot. Highs 112 to 116. .WEDNESDAY NIGHT...Mostly clear. Lows 85 to 91. .THURSDAY...Mostly sunny. Very hot. Highs 111 to 116. $$