Pacific Coast · Wednesday, Sep 23

Iztapa

Updated Tue, Sep 22, 6:20 PM CST

When to go

3:00 PM–5:00 PM

Looks good · Low confidence

3.5–3.5 ft · Offshore waves · not face height

Wind: 3.1 kt · cross-shore

Forecast details

Light wind should keep the water smoother.

Other wind windows

Plan around the wind

The best available upcoming daylight wind sample to compare with the wave evidence. This compares wind only; wave size, tide suitability, and hazards can change your choice.

3:00 PM–5:00 PM · America/Guatemala
Light wind · up to 3.1 kt · reported gusts up to 10.3 kt
Offshore waves: 3.5–3.5 ft across the period. Surf height unavailable. Tide data unavailable.
Wind source time: Sep 22, 5:30 PM CST. This is not the model run issue time.

How these periods are chosen

The planner prefers three consecutive hourly samples covering two daylight hours, but retains shorter one- or two-sample evidence when that is all the forecast provides. Light wind means at most 6 kt. Moderate offshore means at most 12 kt from land toward the sea when shore orientation is verified. Strong wind or known gusts of 20 kt or more remain visible as cautions instead of making the entire comparison disappear. These are comparison labels, not locally tested surf-quality or safety ratings. Missing gusts remain unknown. Terrain shelter, currents, closures, and your ability are not assessed.

Forecast confidence

Returned marine grid point is 6.1 km from the mapped spot. Provider grid resolution is not established for this response.
Reference model hour: 14 hours from now; historical residuals do not measure forecast lead-time error.
No accepted local model for these inputs: missing history, unsupported direction/period/height, or failed historical validation.
Tide unavailable: assessment incomplete, especially at shallow reef breaks.
A mapped coordinate does not establish nearshore grid resolution or terrain/shelter accuracy.

Wind ENE 4.7 kt

Tide Unavailable

Wave, wind and tide details

Offshore model swellWSW 2.1 ft @ 12sValid 2026-09-23 08:00 · America/GuatemalaMarine grid 13.8750, -90.7083 · offshore model, not a local measurement

Offshore model sea3.5 ft @ 10.8sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-23 08:00 · America/Guatemala

Model windENE 4.7 ktcross-shoreValid 2026-09-23 08:00 · America/Guatemala1.4 kt offshore component

TideUnavailableunavailableNo verified local tide station connected; no tide height estimated

INSIVUMEH Monterrico wave chart · 30.2 km from spot

Official graphical forecast for Monterrico: significant wave height (m), wind speed (m/s), wave period (s), and direction at 3-hour intervals. Open the chart for plotted values; this product does not transcribe image values into numeric surf estimates.

2026-09-23Official GFS-Wave named-point chart at 13.75, -90.50 on the same south-facing Pacific coast; offshore significant wave height is not breaking surfFile updated Sep 22, 6:29 AM CST

Surf height unavailable. Coastal and offshore waves are not breaking-wave heights.

Surf and wind

Recommended window: No recommended window

Breaking surf is not reliably resolved. Hourly offshore swell and wind inputs are listed below.

Hourly forecast

Hourly surf forecast for Iztapa
Time	Wind	Tide	Offshore swell
12 AM	ENE 3.3 ktcross-shore	Unavailableunavailable	SW 2.4 ft @ 10s
1 AM	E 3.7 ktcross-shore	Unavailableunavailable	SW 2.4 ft @ 10s
2 AM	E 4.8 ktcross-shore	Unavailableunavailable	SW 2.4 ft @ 10s
3 AM	E 3.9 ktcross-shore	Unavailableunavailable	SW 2.4 ft @ 11s
4 AM	E 5 ktcross-shore	Unavailableunavailable	SW 2.3 ft @ 11s
5 AM	E 5 ktcross-shore	Unavailableunavailable	SW 2.2 ft @ 12s
6 AM	E 5.3 ktcross-shore	Unavailableunavailable	SW 2.2 ft @ 13s
7 AM	E 5.5 ktcross-shore	Unavailableunavailable	SW 2.2 ft @ 13s
8 AM	ENE 4.7 ktcross-shore	Unavailableunavailable	WSW 2.1 ft @ 12s
9 AM	E 5 ktcross-shore	Unavailableunavailable	WSW 2.1 ft @ 12s
10 AM	ESE 4.4 ktcross-shore	Unavailableunavailable	WSW 2.2 ft @ 11s
11 AM	SE 5.2 ktcross-shore	Unavailableunavailable	W 2.2 ft @ 11s
Noon	SE 6.1 ktonshore	Unavailableunavailable	W 2.3 ft @ 10s
1 PM	SE 4.3 ktcross-shore	Unavailableunavailable	W 2.3 ft @ 10s
2 PM	SE 4.5 ktcross-shore	Unavailableunavailable	W 2.4 ft @ 10s
3 PM	ESE 2.3 ktcross-shore	Unavailableunavailable	W 2.4 ft @ 10s
4 PM	NE 2.8 ktcross-shore	Unavailableunavailable	W 2.4 ft @ 10s
5 PM	ENE 3.1 ktcross-shore	Unavailableunavailable	W 2.4 ft @ 10s
6 PM	E 3.6 ktcross-shore	Unavailableunavailable	W 2.4 ft @ 10s
7 PM	E 5 ktcross-shore	Unavailableunavailable	W 2.4 ft @ 10s
8 PM	ENE 4.9 ktcross-shore	Unavailableunavailable	W 2.3 ft @ 10s
9 PM	E 5.7 ktcross-shore	Unavailableunavailable	W 2.3 ft @ 9s
10 PM	E 4.6 ktcross-shore	Unavailableunavailable	W 2.2 ft @ 9s
11 PM	E 2.9 ktcross-shore	Unavailableunavailable	W 2.2 ft @ 10s

12 AMUnavailable

WindENE 3.3 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.4 ft @ 10s

1 AMUnavailable

WindE 3.7 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.4 ft @ 10s

2 AMUnavailable

WindE 4.8 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.4 ft @ 10s

3 AMUnavailable

WindE 3.9 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.4 ft @ 11s

4 AMUnavailable

WindE 5 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.3 ft @ 11s

5 AMUnavailable

WindE 5 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.2 ft @ 12s

6 AMUnavailable

WindE 5.3 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.2 ft @ 13s

7 AMUnavailable

WindE 5.5 ktcross-shoreTideUnavailableunavailableOffshore swellSW 2.2 ft @ 13s

8 AMUnavailable

WindENE 4.7 ktcross-shoreTideUnavailableunavailableOffshore swellWSW 2.1 ft @ 12s

9 AMUnavailable

WindE 5 ktcross-shoreTideUnavailableunavailableOffshore swellWSW 2.1 ft @ 12s

10 AMUnavailable

WindESE 4.4 ktcross-shoreTideUnavailableunavailableOffshore swellWSW 2.2 ft @ 11s

11 AMUnavailable

WindSE 5.2 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.2 ft @ 11s

NoonUnavailable

WindSE 6.1 ktonshoreTideUnavailableunavailableOffshore swellW 2.3 ft @ 10s

1 PMUnavailable

WindSE 4.3 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.3 ft @ 10s

2 PMUnavailable

WindSE 4.5 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.4 ft @ 10s

3 PMUnavailable

WindESE 2.3 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.4 ft @ 10s

4 PMUnavailable

WindNE 2.8 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.4 ft @ 10s

5 PMUnavailable

WindENE 3.1 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.4 ft @ 10s

6 PMUnavailable

WindE 3.6 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.4 ft @ 10s

7 PMUnavailable

WindE 5 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.4 ft @ 10s

8 PMUnavailable

WindENE 4.9 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.3 ft @ 10s

9 PMUnavailable

WindE 5.7 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.3 ft @ 9s

10 PMUnavailable

WindE 4.6 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.2 ft @ 9s

11 PMUnavailable

WindE 2.9 ktcross-shoreTideUnavailableunavailableOffshore swellW 2.2 ft @ 10s

Tide

Local tide station unavailable

Tide predictions are unavailable for this period.

About this spot

Model-grid forecast requested at the mapped coordinate; reef, headland, and nearshore transformations are unresolved. River break.

Mapped spot coordinate: 13.93, -90.71.

Mainland · Coast not verified · Ocean-facing bearing 180° · Location provenance

Model request point: Iztapa (13.93, -90.71). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 3/6 sources

Source availability is not forecast accuracy. Where an empirical model passes historical testing, its error and interval coverage are shown above. Source count cannot increase that confidence.

Coverage tier D · MODEL_FIRST_AMERICAS · spot-level model point

INSIVUMEH Monterrico wave chart · 30.2 km from spot
INSIVUMEH Monterrico wave chart · 30.2 km from spot; Official GFS-Wave named-point chart at 13.75, -90.50 on the same south-facing Pacific coast; offshore significant wave height is not breaking surfCurrentSep 22, 6:29 AM CST
The Buoy API
No current same-exposure Pacific wave observation was verified; listed discovery buoys are at least 893 km away and are not substituted.UnavailableNo source time
WorldTides API
Puerto San José predictions are station-relative, but the public product does not define a verified chart datum; tide heights are withheld.UnavailableNo source time
Open-Meteo Marine API
1 of 1 configured model points availableCurrentSep 22, 5:30 PM CST
Open-Meteo Weather API
1 of 1 configured model points availableCurrentSep 22, 5:30 PM CST
Copernicus Marine Global Ocean Waves
Independent wave-model backend and cross-check; market adapter or station mapping not connectedUnavailableNo source time
Surf-Forecast public pages
Spot discovery and break-specific HTML fallbackNot applicableNo source time
Surfline public spot pages
Break-specific comparison, cams, and metadataNot applicableNo source time

How best guesses are made

Best guesses combine usable wave and wind evidence, with qualitative confidence and specific limitations. A missing tide or local surf-height model does not prevent useful guidance. Tide levels use the named station datum; their effect at this break remains uncertain. Wind direction is relative to the mapped beach orientation, without calibrated terrain or shelter effects. The comparison is a heuristic, not a measured quality rating.