930
FZPN28 KNHC 220311
OFFPZ8

Offshore Waters Forecast
NWS National Hurricane Center Miami, FL
811 PM PDT Thu Aug 21 2025

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.

PMZ101-221515-
Synopsis for the E Pacific within 250 nm of Central America,
Colombia, and within 750 nm of Ecuador
811 PM PDT Thu Aug 21 2025

.SYNOPSIS...Light to gentle winds will prevail across the waters
north of about 07N through the weekend, except for moderate to
locally fresh winds pulsing in the Gulf of Papagayo at night
starting tonight. Gentle to moderate winds are expected south of
05N. Winds become light to gentle over most of the waters south
of northern Costa Rica early next week. Cross-equatorial
southerly swell will propagate across the regional waters keeping
seas in the moderate range through Fri, except in the lee of the
Galapagos Islands, where slight seas are expected. Another round
of large swell will move into the waters off Ecuador and
Colombia by late Fri, and reach the offshore waters of Central
America by Sun.

$$

PMZ111-221515-
Guatemala and El Salvador to 250 nm offshore-
811 PM PDT Thu Aug 21 2025

.TONIGHT...E to SE winds 10 kt in the evening, becoming variable
winds less than 5 kt. Seas 4 to 6 ft in S to SW swell. Period
17 seconds. Isolated showers and thunderstorms.
.FRI...E winds 10 kt. Seas 4 to 6 ft in S swell. Period
16 seconds. Isolated showers and thunderstorms.
.FRI NIGHT...E to SE winds 10 kt. Seas 4 to 6 ft in S swell.
Period 15 seconds. Scattered showers and isolated thunderstorms.
.SAT...E to SE winds 10 kt. Seas 4 to 6 ft in S swell. Period
15 seconds. Scattered showers and isolated thunderstorms.
.SAT NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. Period
17 seconds.
.SUN...SE winds 10 to 15 kt. Seas 5 to 7 ft in S swell. Period
19 seconds.
.SUN NIGHT...SE winds 10 kt. Seas 5 to 7 ft in S swell. Period
19 seconds.
.MON...E winds 10 kt. Seas 6 to 8 ft in S swell. Period
18 seconds.
.MON NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft in S swell.
Period 16 seconds.
.TUE...E winds 10 to 15 kt. Seas 6 to 8 ft in S swell. Period
15 seconds.
.TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft in S swell.
Period 14 seconds.

$$

PMZ113-221515-
El Salvador to North Costa Rica including the Gulfs of Fonseca
and Papagayo-
811 PM PDT Thu Aug 21 2025

.TONIGHT...SW winds 10 kt. Seas 3 to 5 ft. Period 17 seconds.
Scattered showers and isolated thunderstorms.
.FRI...N to NE winds 10 kt, shifting to S in the afternoon.
Seas 3 to 5 ft. Period 16 seconds. Scattered showers and
isolated thunderstorms.
.FRI NIGHT...S winds 10 kt. Seas 4 to 6 ft in S swell. Period
16 seconds. Scattered showers and isolated thunderstorms.
.SAT...NE to E winds 10 to 15 kt, shifting to S in the
afternoon. Seas 5 to 7 ft in S swell. Period 15 seconds.
Scattered showers and isolated thunderstorms.
.SAT NIGHT...S to SW winds 10 to 15 kt. Seas 5 to 7 ft in S
swell. Period 14 seconds.
.SUN...S to SW winds 10 kt. Seas 5 to 7 ft in S to SW swell.
Period 15 seconds.
.SUN NIGHT...SW to W winds 10 kt. Seas 5 to 7 ft in S to SW
swell. Period 19 seconds.
.MON...NE winds 10 to 15 kt. Seas 6 to 8 ft in S swell. Period
18 seconds.
.MON NIGHT...NE to E winds 10 to 15 kt. Seas 6 to 8 ft in S
swell. Period 16 seconds.
.TUE...E winds 15 to 20 kt. Seas 6 to 9 ft in S swell. Period
14 seconds.
.TUE NIGHT...E to SE winds 10 to 15 kt. Seas 6 to 8 ft in S
swell. Period 14 seconds.

$$

PMZ115-221515-
North Costa Rica to West Panama to 250 nm offshore-
811 PM PDT Thu Aug 21 2025

.TONIGHT...Near the Azuero Peninsula, W winds 10 kt in the
evening, becoming variable winds less than 5 kt. Elsewhere, SW
to W winds 10 to 15 kt. Seas 5 to 7 ft in S swell. Period
17 seconds. Scattered showers and thunderstorms.
.FRI...Near the Azuero Peninsula, variable winds less than 5 kt,
becoming SW to W 10 kt in the afternoon. Elsewhere, SW winds
10 to 15 kt. Seas 6 to 8 ft in S swell. Period 16 seconds.
Scattered showers and thunderstorms.
.FRI NIGHT...Near the Azuero Peninsula, W winds 10 kt in the
evening, becoming variable winds less than 5 kt. Elsewhere, SW
to W winds 15 to 20 kt. Seas 6 to 8 ft in S swell. Period
15 seconds. Scattered to numerous showers and thunderstorms.
.SAT...Near the Azuero Peninsula, variable winds less than 5 kt,
becoming SW to W 10 kt in the afternoon. Elsewhere, SW winds
15 to 20 kt. Seas 6 to 8 ft in S to SW swell. Period 14 seconds.
Scattered to numerous showers and thunderstorms.
.SAT NIGHT...SW to W winds 10 to 15 kt. Seas 5 to 7 ft in S to
SW swell. Period 12 seconds.
.SUN...SW to W winds 10 to 15 kt. Seas 6 to 8 ft in S to SW
swell. Period 15 seconds.
.SUN NIGHT...SW to W winds 10 kt. Seas 6 to 9 ft in S to SW
swell. Period 18 seconds.
.MON...Variable winds less than 5 kt Near the Azuero Peninsula,
and SW to W 10 kt Elsewhere. Seas 7 to 10 ft in S to SW swell.
Period 17 seconds.
.MON NIGHT...W to NW winds 10 kt. Seas 7 to 10 ft in S to SW
swell. Period 16 seconds.
.TUE...S to SW winds 10 kt. Seas 6 to 9 ft in S swell. Period
14 seconds.
.TUE NIGHT...Variable winds less than 5 kt Near the Azuero
Peninsula, and S to SW 10 kt Elsewhere. Seas 6 to 8 ft in S
swell. Period 13 seconds.

$$

PMZ117-221515-
East Panama and Colombia including the Gulf of Panama-
811 PM PDT Thu Aug 21 2025

.TONIGHT...SW to W winds 10 kt Gulf of Panama, and S to SW 15 to
20 kt Elsewhere. Seas 5 to 7 ft in S to SW swell. Period
17 seconds. Scattered thunderstorms through the night.
.FRI...SW to W winds 10 to 15 kt Gulf of Panama, and SW 15 to
20 kt Elsewhere. Seas 6 to 8 ft in S to SW swell. Period
17 seconds. Scattered thunderstorms through the day.
.FRI NIGHT...SW to W winds 10 kt Gulf of Panama, and S to SW
15 to 20 kt Elsewhere. Seas 6 to 8 ft. Period 16 seconds.
Scattered thunderstorms through the night.
.SAT...SW winds 10 to 15 kt. Seas 6 to 8 ft in S to SW swell.
Period 15 seconds. Scattered showers and isolated thunderstorms
through the day.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 5 to 7 ft in S to SW
swell. Period 14 seconds.
.SUN...SW winds 10 to 15 kt. Seas 6 to 8 ft in S to SW swell.
Period 17 seconds.
.SUN NIGHT...SW to W winds 10 kt. Seas 6 to 9 ft in S to SW
swell. Period 16 seconds.
.MON...SW winds 10 kt. Seas 7 to 10 ft in S to SW swell. Period
16 seconds.
.MON NIGHT...W winds 10 kt. Seas 7 to 10 ft in S to SW swell.
Period 16 seconds.
.TUE...Variable winds less than 5 kt Gulf of Panama, and SW
10 to 15 kt Elsewhere. Seas 6 to 9 ft in S to SW swell. Period
14 seconds.
.TUE NIGHT...Variable winds less than 5 kt Gulf of Panama, and
SW 10 to 15 kt Elsewhere. Seas 6 to 8 ft in S to SW swell.
Period 14 seconds.

$$

PMZ119-221515-
Ecuador including the Gulf of Guayaquil to 250 nm offshore-
811 PM PDT Thu Aug 21 2025

.TONIGHT...S to SW winds 10 to 15 kt. Seas 5 to 7 ft in S to SW
swell. Period 17 seconds.
.FRI...W winds 10 kt Gulf of Guayaquil, and S to SW 15 to 20 kt
Elsewhere. Seas 5 to 7 ft. Period 16 seconds.
.FRI NIGHT...SW to W winds 10 kt Gulf of Guayaquil, and S to SW
15 to 20 kt Elsewhere. Seas 5 to 7 ft. Period 15 seconds.
.SAT...SW to W winds 10 to 15 kt Gulf of Guayaquil, and S to SW
15 to 20 kt Elsewhere. Seas 6 to 8 ft in S to SW swell. Period
14 seconds.
.SAT NIGHT...S to SW winds 15 to 20 kt. Seas 7 to 10 ft in S to
SW swell. Period 14 seconds.
.SUN...S to SW winds 10 to 15 kt. Seas 8 to 12 ft in S to SW
swell. Period 18 seconds.
.SUN NIGHT...S to SW winds 10 to 15 kt. Seas 8 to 12 ft in S to
SW swell. Period 16 seconds.
.MON...S to SW winds 10 to 15 kt. Seas 7 to 11 ft in S to SW
swell. Period 15 seconds.
.MON NIGHT...S to SW winds 10 to 15 kt. Seas 7 to 10 ft in S to
SW swell. Period 14 seconds.
.TUE...S to SW winds 10 to 15 kt. Seas 6 to 9 ft in S to SW
swell. Period 13 seconds.
.TUE NIGHT...S to SW winds 10 to 15 kt. Seas 6 to 8 ft in S to
SW swell. Period 13 seconds.

$$

PMZ121-221515-
Ecuador between 250 and 500 nm offshore-
811 PM PDT Thu Aug 21 2025

.TONIGHT...S winds 10 to 15 kt. Seas 5 to 7 ft in S swell.
Period 16 seconds.
.FRI...S winds 15 kt. Seas 5 to 7 ft in S swell. Period
15 seconds.
.FRI NIGHT...S winds 15 kt. Seas 6 to 8 ft in S swell. Period
14 seconds.
.SAT...S winds 15 kt. Seas 6 to 9 ft in S swell. Period
14 seconds.
.SAT NIGHT...S winds 15 kt. Seas 7 to 11 ft in S to SW swell.
Period 14 seconds.
.SUN...SE to S winds 10 to 15 kt. Seas 9 to 13 ft in S to SW
swell. Period 18 seconds.
.SUN NIGHT...SE to S winds 10 kt. Seas 9 to 13 ft in S to SW
swell. Period 16 seconds.
.MON...SE to S winds 10 kt. Seas 7 to 11 ft in S swell. Period
14 seconds.
.MON NIGHT...SE to S winds 10 to 15 kt. Seas 7 to 10 ft in S
swell. Period 13 seconds.
.TUE...SE to S winds 10 to 15 kt. Seas 6 to 9 ft in S swell.
Period 13 seconds.
.TUE NIGHT...SE to S winds 10 to 15 kt. Seas 6 to 8 ft in SE to
S swell. Period 12 seconds.

$$

PMZ123-221515-
Offshore Galapagos Islands-
811 PM PDT Thu Aug 21 2025

.TONIGHT...SE to S winds 10 to 15 kt. Seas 5 to 7 ft in S swell.
Period 15 seconds.
.FRI...SE to S winds 10 to 15 kt. Seas 5 to 7 ft in S swell.
Period 14 seconds.
.FRI NIGHT...SE to S winds 15 to 20 kt. Seas 6 to 8 ft in S
swell. Period 14 seconds.
.SAT...SE to S winds 15 to 20 kt. Seas 6 to 9 ft in S swell.
Period 11 seconds.
.SAT NIGHT...SE to S winds 15 to 20 kt. Seas 7 to 11 ft in S
swell. Period 14 seconds.
.SUN...SE winds 15 to 20 kt. Seas 9 to 13 ft in S swell. Period
14 seconds.
.SUN NIGHT...SE winds 10 to 15 kt. Seas 9 to 13 ft in S swell.
Period 14 seconds.
.MON...SE winds 10 to 15 kt. Seas 7 to 11 ft in S swell. Period
13 seconds.
.MON NIGHT...SE winds 10 to 15 kt. Seas 7 to 10 ft in SE to S
swell. Period 13 seconds.
.TUE...SE to S winds 10 to 15 kt. Seas 6 to 9 ft in SE to S
swell. Period 12 seconds.
.TUE NIGHT...SE to S winds 10 to 15 kt. Seas 6 to 8 ft in SE to
S swell. Period 12 seconds.

$$

Forecaster Aguirre