Lisbon and Ericeira · Thursday, Sep 24

Ribeira dIlhas

Updated Wed, Sep 23, 1:20 AM GMT+1

When to go

9:00 AM–11:00 AM

Looks good · Low confidence

5.2–5.3 ft · Offshore waves · not face height

Wind: 2.9 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.

8:00 AM–10:00 AM · Europe/Lisbon
Light wind · up to 2.5 kt · reported gusts up to 8.4 kt
Offshore waves: 5.2–5.4 ft across the period. Surf height unavailable. Tide data unavailable.
Wind source time: Sep 23, 12:30 AM GMT+1. 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 4.8 km from the mapped spot. Provider grid resolution is not established for this response.
Reference model hour: 31 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 1.9 kt

Tide Unavailable

Wave, wind and tide details

Offshore model swellNW 4.8 ft @ 10sValid 2026-09-24 08:00 · Europe/LisbonMarine grid 38.9583, -9.4583 · offshore model, not a local measurement

Offshore model sea5.4 ft @ 10.8sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-24 08:00 · Europe/Lisbon

Model windENE 1.9 ktcross-shoreValid 2026-09-24 08:00 · Europe/Lisbon0.7 kt offshore component

TideUnavailableunavailableNo verified local tide station connected; no tide height estimated

IPMA Lisboa, costa · 39 km from spot3.3–4.9 ftDaily offshore significant wave height; not breaking surfFile updated Sep 23, 12:31 AM GMT+1

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 Ribeira dIlhas
Time	Wind	Tide	Offshore swell
12 AM	NE 1.9 ktcross-shore	Unavailableunavailable	NW 5.2 ft @ 11s
1 AM	ENE 2 ktcross-shore	Unavailableunavailable	NW 5.1 ft @ 11s
2 AM	NE 2.1 ktcross-shore	Unavailableunavailable	NW 5.1 ft @ 11s
3 AM	ENE 2.2 ktcross-shore	Unavailableunavailable	NW 5.1 ft @ 10s
4 AM	ENE 2.6 ktcross-shore	Unavailableunavailable	NW 5.0 ft @ 10s
5 AM	E 2.9 ktcross-shore	Unavailableunavailable	NW 4.9 ft @ 10s
6 AM	E 2.9 ktoffshore	Unavailableunavailable	NW 4.9 ft @ 10s
7 AM	E 2.3 ktoffshore	Unavailableunavailable	NW 4.9 ft @ 10s
8 AM	ENE 1.9 ktcross-shore	Unavailableunavailable	NW 4.8 ft @ 10s
9 AM	NE 1.8 ktcross-shore	Unavailableunavailable	NW 4.8 ft @ 10s
10 AM	NNE 2.5 ktcross-shore	Unavailableunavailable	NW 4.7 ft @ 10s
11 AM	N 2.9 ktcross-shore	Unavailableunavailable	NW 4.7 ft @ 10s
Noon	N 4.7 ktonshore	Unavailableunavailable	NW 4.7 ft @ 10s
1 PM	NNW 6 ktonshore	Unavailableunavailable	NW 4.7 ft @ 10s
2 PM	NNW 5.3 ktonshore	Unavailableunavailable	NW 4.6 ft @ 10s
3 PM	NNW 5.5 ktonshore	Unavailableunavailable	NW 4.6 ft @ 10s
4 PM	NNW 5.2 ktonshore	Unavailableunavailable	NW 4.5 ft @ 10s
5 PM	NNW 4.8 ktonshore	Unavailableunavailable	NW 4.5 ft @ 10s
6 PM	N 4.3 ktonshore	Unavailableunavailable	NW 4.5 ft @ 10s
7 PM	N 3.5 ktonshore	Unavailableunavailable	NW 4.4 ft @ 9s
8 PM	N 2.5 ktonshore	Unavailableunavailable	NW 4.3 ft @ 9s
9 PM	N 2.2 ktcross-shore	Unavailableunavailable	NW 4.3 ft @ 9s
10 PM	NNE 2.3 ktcross-shore	Unavailableunavailable	NW 4.2 ft @ 9s
11 PM	NE 2.1 ktcross-shore	Unavailableunavailable	NW 4.1 ft @ 9s

12 AMUnavailable

WindNE 1.9 ktcross-shoreTideUnavailableunavailableOffshore swellNW 5.2 ft @ 11s

1 AMUnavailable

WindENE 2 ktcross-shoreTideUnavailableunavailableOffshore swellNW 5.1 ft @ 11s

2 AMUnavailable

WindNE 2.1 ktcross-shoreTideUnavailableunavailableOffshore swellNW 5.1 ft @ 11s

3 AMUnavailable

WindENE 2.2 ktcross-shoreTideUnavailableunavailableOffshore swellNW 5.1 ft @ 10s

4 AMUnavailable

WindENE 2.6 ktcross-shoreTideUnavailableunavailableOffshore swellNW 5.0 ft @ 10s

5 AMUnavailable

WindE 2.9 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.9 ft @ 10s

6 AMUnavailable

WindE 2.9 ktoffshoreTideUnavailableunavailableOffshore swellNW 4.9 ft @ 10s

7 AMUnavailable

WindE 2.3 ktoffshoreTideUnavailableunavailableOffshore swellNW 4.9 ft @ 10s

8 AMUnavailable

WindENE 1.9 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.8 ft @ 10s

9 AMUnavailable

WindNE 1.8 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.8 ft @ 10s

10 AMUnavailable

WindNNE 2.5 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.7 ft @ 10s

11 AMUnavailable

WindN 2.9 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.7 ft @ 10s

NoonUnavailable

WindN 4.7 ktonshoreTideUnavailableunavailableOffshore swellNW 4.7 ft @ 10s

1 PMUnavailable

WindNNW 6 ktonshoreTideUnavailableunavailableOffshore swellNW 4.7 ft @ 10s

2 PMUnavailable

WindNNW 5.3 ktonshoreTideUnavailableunavailableOffshore swellNW 4.6 ft @ 10s

3 PMUnavailable

WindNNW 5.5 ktonshoreTideUnavailableunavailableOffshore swellNW 4.6 ft @ 10s

4 PMUnavailable

WindNNW 5.2 ktonshoreTideUnavailableunavailableOffshore swellNW 4.5 ft @ 10s

5 PMUnavailable

WindNNW 4.8 ktonshoreTideUnavailableunavailableOffshore swellNW 4.5 ft @ 10s

6 PMUnavailable

WindN 4.3 ktonshoreTideUnavailableunavailableOffshore swellNW 4.5 ft @ 10s

7 PMUnavailable

WindN 3.5 ktonshoreTideUnavailableunavailableOffshore swellNW 4.4 ft @ 9s

8 PMUnavailable

WindN 2.5 ktonshoreTideUnavailableunavailableOffshore swellNW 4.3 ft @ 9s

9 PMUnavailable

WindN 2.2 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.3 ft @ 9s

10 PMUnavailable

WindNNE 2.3 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.2 ft @ 9s

11 PMUnavailable

WindNE 2.1 ktcross-shoreTideUnavailableunavailableOffshore swellNW 4.1 ft @ 9s

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. Reef break.

Mapped spot coordinate: 38.99, -9.42.

Mainland · Coast not verified · Ocean-facing bearing 315° · Location provenance

Model request point: Ribeira dIlhas (38.99, -9.42). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 3/7 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 B · PORTUGAL · spot-level model point

IPMA Lisboa, costa · 39 km from spot
IPMA Lisboa, costa · 39 km from spot; Daily offshore significant wave height; not breaking surfCurrentSep 23, 12:31 AM GMT+1
Instituto Hidrográfico MONICAN Buoys and Tides
Real-time wave-buoy parameters and tide predictions; market adapter or station mapping not connectedUnavailableNo source time
The Buoy API
Normalized nearest-buoy discovery and readings; market adapter or station mapping not connectedUnavailableNo source time
WorldTides API
Tide predictions and station lookup; market adapter or station mapping not connectedUnavailableNo source time
Open-Meteo Marine API
1 of 1 configured model points availableCurrentSep 23, 12:30 AM GMT+1
Open-Meteo Weather API
1 of 1 configured model points availableCurrentSep 23, 12:30 AM GMT+1
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.