FOMY50 PGUM 230611 PFMGUM Point Forecast Matrices National Weather Service Tiyan GU 410 PM ChST Sun Aug 23 2026 GUZ001-231800- Guam International Airport-Tiyan GU 13.48N 144.79E Elev. 248 ft 410 PM ChST Sun Aug 23 2026 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 86 77 85 78 Temp 85 82 80 78 78 82 85 85 83 81 79 78 78 82 85 85 83 81 79 78 Dewpt 79 79 79 78 78 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 RH 82 91 97100100 91 82 82 88 94100100100 88 80 80 85 91 97100 Wind dir SW SW SW SW SW S S S S SW SW SW SW SW SW W W W W W Wind spd 11 8 6 6 9 11 12 11 9 6 5 5 8 10 11 10 8 4 3 4 Clouds OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 60 70 70 50 40 QPF 12hr 0.41 0.61 0.60 0.35 0.52 Rain shwrs L L L L L L L L C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S Heat index 98 93 86 92 98 97 94 90 84 91 96 96 93 90 85 Max heat 103 102 91 92 98 96 89 91 96 95 89 High Surf Y Y Y Y Y Y Y Date 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 82 78 84 78 85 79 87 79 86 Temp 80 82 80 79 82 84 81 78 82 84 81 79 84 86 84 82 84 85 Dewpt 78 78 78 78 78 78 79 78 78 79 79 79 79 79 79 79 79 79 PWind dir SW W SW W W W W W W Wind char LT LT LT GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 40 60 60 60 50 40 30 Rain shwrs C C C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ001-231800- Rota International Airport-Sinapalu MP 14.17N 145.23E Elev. 592 ft 410 PM ChST Sun Aug 23 2026 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 85 77 84 77 Temp 84 82 80 78 79 82 85 84 83 80 78 77 77 81 83 83 82 80 78 77 Dewpt 79 79 79 78 79 79 79 79 79 79 78 77 77 78 78 78 78 78 78 77 RH 85 91 97100100 91 82 85 88 97100100100 91 85 85 88 94100100 Wind dir SW SW S S S S S S S SW SW SW SW SW SW SW SW SW SW SW Wind spd 12 10 9 9 12 13 13 11 10 9 9 9 9 10 11 10 9 6 4 3 Clouds OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 60 70 70 50 40 QPF 12hr 0.58 0.33 0.32 0.42 0.30 Rain shwrs L L L L L L L L C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S Heat index 96 92 85 92 97 96 93 89 89 94 93 91 86 Max heat 100 99 90 92 9795 85 89 94 92 85 High Surf Y Y Y Y Y Y Y Date 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 83 76 84 77 83 78 83 79 84 Temp 80 82 79 77 81 84 81 78 81 83 80 78 81 83 82 82 83 84 Dewpt 78 78 79 77 78 79 79 78 79 79 79 78 79 79 79 79 79 79 PWind dir SW SW SW SW SW W W W W Wind char LT LT LT GN GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 40 60 60 60 50 40 30 Rain shwrs C C C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ002-231800- Tinian-San Jose MP 14.97N 145.63E Elev. 74 ft 410 PM ChST Sun Aug 23 2026 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 78 87 78 86 77 Temp 85 83 80 79 79 83 86 86 84 82 81 79 80 83 86 85 83 81 79 77 Dewpt 79 79 79 79 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 77 RH 82 88 97100100 88 80 80 85 91 94 97 94 85 77 80 85 91 97100 Wind dir S S S S S S S S S S S S S S SW SW SW SW SW SW Wind spd 10 10 10 10 11 11 11 10 9 8 8 8 8 8 8 8 5 4 3 2 Clouds OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 60 70 70 50 40 QPF 12hr 0.28 0.23 0.21 0.10 0.19 Rain shwrs L L L L L L L L C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S Heat index 98 93 89 85 94100 99 96 93 89 85 86 93 98 97 94 89 Max heat 101 100 92 94 100 98 91 93 98 96 88 High Surf Y Y Y Y Y Y Y Date 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 85 78 86 78 83 78 84 79 85 Temp 82 84 81 78 82 85 81 78 81 82 80 78 82 84 83 81 84 85 Dewpt 78 78 79 78 79 79 79 78 79 79 79 78 79 79 79 79 79 79 PWind dir S S S SW SW W W W W Wind char LT LT LT LT GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B2 OV OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 40 60 60 60 50 40 30 Rain shwrs C C C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$ MPZ003-231800- Saipan International Airport-Obyan MP 15.11N 145.72E Elev. 215 ft 410 PM ChST Sun Aug 23 2026 Date Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 Wed ChST3hrly 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 UTC 3hrly 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 Min/Max 79 87 78 86 77 Temp85 83 81 79 80 84 87 86 85 83 81 79 80 83 86 85 83 81 79 78 Dewpt 79 79 79 79 79 79 79 79 79 79 79 78 78 78 78 78 78 78 78 78 RH 82 88 94100 97 85 77 80 82 88 94 97 94 85 77 80 85 91 97100 Wind dir S S S S S S S S S S S S S S SW SW SW S S S Wind spd 11 10 9 10 11 11 10 9 9 8 6 6 8 9 8 8 5 3 2 2 Clouds OV OV OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 60 70 70 50 40 QPF 12hr 0.33 0.22 0.15 0.10 0.16 Rain shwrs L L L L L L L L C C C C C C C C C C C C Tstms S S S S S S S S S S S S S S S S S S S S Heat index 98 94 90 85 86 95100100 97 93 89 85 86 93 98 97 94 90 Max heat 102 101 92 95 100 99 92 93 98 96 88 High Surf Y Y Y Y Y Y Y Date 08/26/26 Thu 08/27/26 Fri 08/28/26 Sat 08/29/26 Sun 08/30/26 ChST6hrly 10 16 22 04 10 16 22 04 10 16 22 04 10 16 22 04 10 16 UTC 6hrly 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 Max/Min 85 78 86 77 83 78 85 79 85 Temp 82 85 81 78 83 85 81 78 81 83 80 78 82 84 83 82 84 85 Dewpt 78 78 79 78 79 78 79 78 79 79 79 78 79 79 79 79 79 79 PWind dir S S S S SW W W W W Wind char LT LT LT LT GN GN GN GN GN Avg clouds B1 B1 B1 B1 B1 B1 B2 OV OV OV B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 40 40 60 60 60 50 40 30 Rain shwrs C C C C C C L L L L L C C C C C C C Tstms S S S S S S S S S S S S S S S S S S $$