FZPN28 KNHC 180852 OFFPZ8 Offshore Waters Forecast NWS National Hurricane Center Miami, FL 152 AM PDT Mon May 18 2026 Offshore Waters Forecast for the E Pacific within 250 nm of Central America, Colombia, and within 750 nm of Ecuador Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. PMZ101-182100- Synopsis for the E Pacific within 250 nm of Central America, Colombia, and within 750 nm of Ecuador 152 AM PDT Mon May 18 2026 .SYNOPSIS...Fresh to occasionally strong winds will pulse across the Gulf of Papagayo mainly in overnight and early morning hours through Thu morning. Elsewhere, gentle to moderate winds along with moderate seas in southerly swell are expected through midweek. $$ PMZ111-182100- Guatemala and El Salvador to 250 nm offshore- 152 AM PDT Mon May 18 2026 .TODAY...E winds 10 to 15 kt. Seas 4 to 6 ft. Period 13 seconds. .TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Period 13 seconds. .TUE...E to SE winds 10 to 15 kt. Seas 4 to 6 ft. Period 15 seconds. .TUE NIGHT...E to SE winds 10 to 15 kt. Seas 3 to 5 ft. Period 17 seconds. Scattered showers and isolated tstms through the night. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. Period 15 seconds. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Period 15 seconds. .THU...NE winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .THU NIGHT...SE winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .FRI...NE winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .FRI NIGHT...NE winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. $$ PMZ113-182100- El Salvador to North Costa Rica including the Gulfs of Fonseca and Papagayo- 152 AM PDT Mon May 18 2026 .TODAY...E winds 20 to 25 kt in the Gulf of Papagayo, subsiding to 15 to 20 kt. NE to E winds 10 to 15 kt elsewhere. Seas 5 to 7 ft in S to SW swell. Period 13 seconds. .TONIGHT...E winds 20 to 25 kt in the Gulf of Papagayo, subsiding to 15 to 20 kt. E to SE winds 10 to 15 kt elsewhere. Seas 4 to 6 ft. Period 13 seconds. .TUE...E winds 15 to 20 kt. Seas 5 to 7 ft in S swell. Period 17 seconds. .TUE NIGHT...NE to E winds 20 to 25 kt Offshore Gulf of Papagayo, and SE 15 to 20 kt Elsewhere. Seas 4 to 6 ft. Period 17 seconds. .WED...NE winds 15 to 20 kt. Seas 5 to 7 ft. Period 13 seconds. .WED NIGHT...NE to E winds 20 to 25 kt Offshore Gulf of Papagayo, and E to SE 10 to 15 kt Elsewhere. Seas 3 to 5 ft. Period 15 seconds. .THU...NE winds 15 to 20 kt. Seas 4 to 6 ft. Period 14 seconds. .THU NIGHT...E winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .FRI...E to SE winds 10 to 15 kt. Seas 3 to 5 ft. Period 14 seconds. .FRI NIGHT...SE winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. $$ PMZ115-182100- North Costa Rica to West Panama to 250 nm offshore- 152 AM PDT Mon May 18 2026 .TODAY...Variable winds less than 5 kt. Seas 3 to 5 ft in S to SW swell. Period 13 seconds. Scattered showers and isolated tstms through the day. .TONIGHT...Variable winds less than 5 kt. Seas 2 to 4 ft. Period 17 seconds. .TUE...Near the Azuero Peninsula, NE winds 10 kt, shifting to E to SE in the afternoon. Elsewhere, variable winds less than 5 kt. Seas 2 to 4 ft. Period 17 seconds. .TUE NIGHT...Variable winds less than 5 kt. Seas 2 to 4 ft. Period 17 seconds. Scattered showers and isolated tstms through the night. .WED...W to NW winds 10 kt Near the Azuero Peninsula, and variable less than 5 kt Elsewhere. Seas 2 to 4 ft. Period 15 seconds. .WED NIGHT...Variable winds less than 5 kt. Seas 2 to 4 ft. Period 15 seconds. .THU...Variable winds less than 5 kt. Seas 3 to 5 ft in SW swell. Period 14 seconds. .THU NIGHT...Variable winds less than 5 kt. Seas 3 to 5 ft in S to SW swell. Period 14 seconds. .FRI...Variable winds less than 5 kt. Seas 3 to 5 ft in S to SW swell. Period 14 seconds. .FRI NIGHT...Variable winds less than 5 kt. Seas 3 to 5 ft in S swell. Period 13 seconds. $$ PMZ117-182100- East Panama and Colombia including the Gulf of Panama- 152 AM PDT Mon May 18 2026 .TODAY...S winds 10 kt in the morning, becoming variable winds less than 5 kt. Seas 2 to 4 ft. Period 14 seconds. Scattered showers and isolated tstms through the day. .TONIGHT...Gulf of Panama, E to SE winds 10 kt, shifting to S late. Elsewhere, variable winds less than 5 kt. Seas 2 to 4 ft. Period 17 seconds. .TUE...SE to S winds 10 kt, shifting to W to NW in the afternoon. Seas 2 to 4 ft. Period 17 seconds. .TUE NIGHT...SW winds 10 kt. Seas 2 to 4 ft. Period 17 seconds. Scattered showers and isolated tstms through the night. .WED...SW to W winds 10 kt. Seas 3 to 5 ft. Period 15 seconds. .WED NIGHT...SW to W winds 10 kt. Seas 3 to 5 ft. Period 15 seconds. .THU...S to SW winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .THU NIGHT...Variable winds less than 5 kt Gulf of Panama, and SW 10 kt Elsewhere. Seas 3 to 5 ft. Period 14 seconds. .FRI...Variable winds less than 5 kt Gulf of Panama, and SW 10 kt Elsewhere. Seas 2 to 4 ft. Period 14 seconds. .FRI NIGHT...Variable winds less than 5 kt. Seas 2 to 4 ft. Period 14 seconds. $$ PMZ119-182100- Ecuador including the Gulf of Guayaquil to 250 nm offshore- 152 AM PDT Mon May 18 2026 .TODAY...S to SW winds 10 kt. Seas 3 to 5 ft. Period 17 seconds. .TONIGHT...S winds 10 kt. Seas 3 to 5 ft. Period 17 seconds. .TUE...Gulf of Guayaquil, variable winds less than 5 kt, becoming SW to W 10 kt in the afternoon. Elsewhere, S to SW winds 10 kt. Seas 4 to 6 ft in SW swell. Period 17 seconds. .TUE NIGHT...Gulf of Guayaquil, SW winds 10 kt in the evening, becoming variable winds less than 5 kt. Elsewhere, S winds 10 kt. Seas 4 to 6 ft in SW swell. Period 15 seconds. .WED...S to SW winds 10 kt. Seas 4 to 6 ft in SW swell. Period 14 seconds. .WED NIGHT...S to SW winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 14 seconds. .THU...S to SW winds 10 kt. Seas 4 to 6 ft in S to SW swell. Period 15 seconds. .THU NIGHT...S to SW winds 10 kt. Seas 4 to 6 ft in S swell. Period 14 seconds. .FRI...S to SW winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. .FRI NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft. Period 13 seconds. $$ PMZ121-182100- Ecuador between 250 and 500 nm offshore- 152 AM PDT Mon May 18 2026 .TODAY...SE to S winds 10 kt. Seas 3 to 5 ft. Period 17 seconds. .TONIGHT...SE to S winds 10 to 15 kt. Seas 3 to 5 ft. Period 17 seconds. .TUE...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period 16 seconds. .TUE NIGHT...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period 16 seconds. .WED...SE to S winds 10 kt. Seas 4 to 6 ft in SW swell. Period 14 seconds. .WED NIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. Period 14 seconds. .THU...SE to S winds 10 kt. Seas 4 to 6 ft in S swell. Period 14 seconds. .THU NIGHT...SE to S winds 10 kt. Seas 4 to 6 ft in SE to S swell. Period 14 seconds. .FRI...SE to S winds 10 kt. Seas 4 to 6 ft in S swell. Period 14 seconds. .FRI NIGHT...SE to S winds 10 kt. Seas 3 to 5 ft. Period 14 seconds. $$ PMZ123-182100- Offshore Galapagos Islands- 152 AM PDT Mon May 18 2026 .TODAY...SE winds 10 to 15 kt. Seas 4 to 6 ft. Period 17 seconds. .TONIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. Period 17 seconds. .TUE...SE winds 10 to 15 kt. Seas 5 to 7 ft. Period 16 seconds. .TUE NIGHT...SE to S winds 10 to 15 kt. Seas 5 to 7 ft in SW to W swell. Period 15 seconds. .WED...SE to S winds 10 to 15 kt. Seas 6 to 8 ft in SW swell. Period 13 seconds. .WED NIGHT...SE to S winds 10 to 15 kt. Seas 5 to 7 ft in S to SW swell. Period 13 seconds. .THU...SE to S winds 10 to 15 kt. Seas 5 to 7 ft in SE to S swell. Period 13 seconds. .THU NIGHT...SE to S winds 10 kt. Seas 5 to 7 ft in SE to S swell. Period 14 seconds. .FRI...SE to S winds 10 kt. Seas 5 to 7 ft in S swell. Period 13 seconds. .FRI NIGHT...SE winds 10 kt. Seas 4 to 6 ft in W to NW swell. Period 14 seconds. $$ Forecaster Christensen