718
FZPN28 KNHC 171636
OFFPZ8

Offshore Waters Forecast
NWS National Hurricane Center Miami, FL
936 AM PDT Thu Sep 17 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.

PMZ101-180445-
Synopsis for the E Pacific within 250 nm of Central America,
Colombia, and within 750 nm of Ecuador
936 AM PDT Thu Sep 17 2026

.SYNOPSIS...The pressure gradient between a ridge north of the
area and the eastern north Pacific monsoon trough will support
pulsing fresh to occasionally strong easterly winds and moderate
to rough seas across the Papagayo region today, then pulsing to
moderate to fresh thereafter. Moderate winds and seas will
prevail elsewhere.

$$

PMZ111-180445-
Guatemala and El Salvador to 250 nm offshore-
936 AM PDT Thu Sep 17 2026

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

$$

PMZ113-180445-
El Salvador to North Costa Rica including the Gulfs of Fonseca
and Papagayo-
936 AM PDT Thu Sep 17 2026

.TODAY...NE to E winds 20 to 25 kt Offshore Gulf of Papagayo,
and E 15 to 20 kt Elsewhere. Seas 6 to 8 ft in S swell. Period
14 seconds. Isolated showers and thunderstorms.
.TONIGHT...E winds 15 to 20 kt. Seas 6 to 8 ft. Period
14 seconds. Isolated showers and thunderstorms.
.FRI...Offshore Gulf of Papagayo, NE to E winds 15 to 20 kt.
Elsewhere, E winds 10 to 15 kt, shifting to S in the afternoon.
Seas 5 to 7 ft in S to SW swell. Period 16 seconds. Isolated
showers and thunderstorms.
.FRI NIGHT...S to SW winds 10 kt, shifting to W late.
Seas 4 to 6 ft in S to SW swell. Period 19 seconds. Isolated
showers and thunderstorms.
.SAT...NW winds 10 to 15 kt. Seas 3 to 5 ft. Period 17 seconds.
.SAT NIGHT...W winds 10 kt. Seas 3 to 5 ft. Period 17 seconds.
.SUN...NW winds 10 kt. Seas 2 to 4 ft. Period 18 seconds.
.SUN NIGHT...W to NW winds 10 kt. Seas 2 to 4 ft. Period
17 seconds.
.MON...NW to N winds 10 kt. Seas 3 to 5 ft. Period 17 seconds.
.MON NIGHT...SW winds 10 kt. Seas 3 to 5 ft. Period 16 seconds.

$$

PMZ115-180445-
North Costa Rica to West Panama to 250 nm offshore-
936 AM PDT Thu Sep 17 2026

.TODAY...Near the Azuero Peninsula, NW to N winds 10 kt in the
morning, becoming variable winds less than 5 kt. Elsewhere,
variable winds less than 5 kt. Seas 3 to 5 ft in S to SW swell.
Period 14 seconds. Scattered showers and isolated thunderstorms.
.TONIGHT...SW to W winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 14 seconds. Scattered showers and isolated thunderstorms.
.FRI...SW to W winds 10 kt. Seas 3 to 5 ft. Period 13 seconds.
Scattered showers and isolated thunderstorms.
.FRI NIGHT...W winds 10 kt. Seas 3 to 5 ft. Period 19 seconds.
Scattered showers and isolated thunderstorms.
.SAT...SW to W winds 10 kt. Seas 3 to 5 ft. Period 15 seconds.
.SAT NIGHT...W winds 10 kt. Seas 3 to 5 ft. Period 15 seconds.
.SUN...SW to W winds 10 kt. Seas 3 to 5 ft. Period 15 seconds.
.SUN NIGHT...SW to W winds 10 to 15 kt. Seas 3 to 5 ft. Period
18 seconds.
.MON...SW to W winds 10 to 15 kt. Seas 3 to 5 ft. Period
17 seconds.
.MON NIGHT...SW to W winds 10 to 15 kt. Seas 3 to 5 ft. Period
16 seconds.

$$

PMZ117-180445-
East Panama and Colombia including the Gulf of Panama-
936 AM PDT Thu Sep 17 2026

.TODAY...S winds 10 kt, shifting to W in the afternoon. Seas
3 to 5 ft in S to SW swell. Period 14 seconds.
.TONIGHT...SW to W winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 14 seconds. Scattered showers and isolated thunderstorms.
.FRI...SW to W winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 13 seconds. Scattered showers and isolated thunderstorms.
.FRI NIGHT...SW to W winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 13 seconds. Scattered showers and isolated thunderstorms.
.SAT...SW winds 10 kt. Seas 3 to 5 ft in S to SW swell. Period
12 seconds.
.SAT NIGHT...SW to W winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 12 seconds.
.SUN...SW winds 10 kt. Seas 3 to 5 ft in S to SW swell. Period
15 seconds.
.SUN NIGHT...SW winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 18 seconds.
.MON...SW winds 10 kt. Seas 3 to 5 ft in S to SW swell. Period
17 seconds.
.MON NIGHT...SW to W winds 10 to 15 kt. Seas 3 to 5 ft. Period
16 seconds.

$$

PMZ119-180445-
Ecuador including the Gulf of Guayaquil to 250 nm offshore-
936 AM PDT Thu Sep 17 2026

.TODAY...Gulf of Guayaquil, variable winds less than 5 kt,
becoming SW to W 10 kt in the afternoon. Elsewhere, S to SW
winds 10 to 15 kt. Seas 4 to 6 ft. Period 14 seconds.
.TONIGHT...S to SW winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.FRI...S to SW winds 10 to 15 kt. Seas 4 to 6 ft in SW swell.
Period 13 seconds.
.FRI NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft in SW swell.
Period 13 seconds.
.SAT...SW winds 10 kt. Seas 3 to 5 ft in SW swell. Period 12
seconds.
.SAT NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft in SW swell.
Period 15 seconds.
.SUN...S to SW winds 10 kt. Seas 3 to 5 ft in SW swell. Period
18 seconds.
.SUN NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft in SW swell.
Period 17 seconds.
.MON...S to SW winds 10 kt. Seas 3 to 5 ft in SW swell. Period
16 seconds.
.MON NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft in SW swell.
Period 16 seconds.

$$

PMZ121-180445-
Ecuador between 250 and 500 nm offshore-
936 AM PDT Thu Sep 17 2026

.TODAY...S winds 10 to 15 kt. Seas 4 to 6 ft. Period 13 seconds.
.TONIGHT...S winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.FRI...S winds 10 to 15 kt. Seas 4 to 6 ft in S to SW swell.
Period 13 seconds.
.FRI NIGHT...S winds 10 kt. Seas 4 to 6 ft in S to SW swell.
Period 12 seconds.
.SAT...S winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 15 seconds.
.SAT NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. Period
17 seconds.
.SUN...S winds 10 kt. Seas 3 to 5 ft in S to SW swell. Period 17
seconds.
.SUN NIGHT...S winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 16 seconds.
.MON...S winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 16 seconds.
.MON NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 15 seconds.

$$

PMZ123-180445-
Offshore Galapagos Islands-
936 AM PDT Thu Sep 17 2026

.TODAY...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.TONIGHT...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.FRI...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.FRI NIGHT...SE to S winds 10 to 15 kt. Seas 4 to 6 ft in S to
SW swell. Period 18 seconds.
.SAT...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period
14 seconds.
.SAT NIGHT...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period
14 seconds.
.SUN...SE to S winds 10 to 15 kt. Seas 4 to 6 ft. Period
13 seconds.
.SUN NIGHT...S winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 13 seconds.
.MON...S winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 13 seconds.
.MON NIGHT...S to SW winds 10 kt. Seas 3 to 5 ft in S to SW swell.
Period 13 seconds.

$$

Forecaster Aguirre