Cornwall · Today

Porthleven

Updated Wed, Sep 23, 12:40 AM GMT+1

When to go

Around 8:00 AM

Looks good · Low confidence

1.9–1.9 ft · Offshore waves · not face height

Wind: 4.1 kt · direction unavailable

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/London
Wind speed available · shore exposure unknown · up to 8.7 kt · reported gusts up to 15.7 kt
Offshore waves: 1.9–2.0 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 5.2 km from the mapped spot. Provider grid resolution is not established for this response.
Reference model hour: 0 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 NW 4.7 kt

Tide Unavailable

Wave, wind and tide details

Offshore model swellW 1.2 ft @ 12sValid 2026-09-23 01:00 · Europe/LondonMarine grid 50.1250, -5.2917 · offshore model, not a local measurement

Offshore model sea1.8 ft @ 11.3sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-23 01:00 · Europe/London

Model windNW 4.7 ktunavailableValid 2026-09-23 01:00 · Europe/London

TideUnavailableunavailableNo verified local tide station connected; no tide height estimated

MET Norway Ocean Forecast · Porthleven · grid 50.0783,-5.3538 (2 km)2.3–3.0 ftRange across available hourly significant offshore wave forecasts for this local date; not breaking surf. Coastal shelter and nearshore transformations unresolvedIssued Sep 22, 10:08 PM 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 Porthleven
Time	Wind	Tide	Offshore swell
12 AM	N 2.7 ktunavailable	Unavailableunavailable	W 1.2 ft @ 13s
1 AM	NW 4.7 ktunavailable	Unavailableunavailable	W 1.2 ft @ 12s
2 AM	NW 4.7 ktunavailable	Unavailableunavailable	W 1.4 ft @ 12s
3 AM	NNW 3.7 ktunavailable	Unavailableunavailable	W 1.4 ft @ 12s
4 AM	NW 4.7 ktunavailable	Unavailableunavailable	W 1.6 ft @ 12s
5 AM	NW 3.7 ktunavailable	Unavailableunavailable	W 1.6 ft @ 12s
6 AM	NW 6 ktunavailable	Unavailableunavailable	W 1.6 ft @ 12s
7 AM	NW 3.5 ktunavailable	Unavailableunavailable	W 1.6 ft @ 11s
8 AM	WNW 4.1 ktunavailable	Unavailableunavailable	W 1.6 ft @ 11s
9 AM	NW 7.4 ktunavailable	Unavailableunavailable	W 1.6 ft @ 11s
10 AM	NW 8.7 ktunavailable	Unavailableunavailable	W 1.6 ft @ 11s
11 AM	NW 9.5 ktunavailable	Unavailableunavailable	W 1.6 ft @ 11s
Noon	NNW 11.3 ktunavailable	Unavailableunavailable	W 1.7 ft @ 11s
1 PM	NNW 10.3 ktunavailable	Unavailableunavailable	W 1.7 ft @ 10s
2 PM	NNW 12.4 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
3 PM	N 12.2 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
4 PM	N 9.9 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
5 PM	N 9.5 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
6 PM	NNE 10.3 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
7 PM	NNE 5.8 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
8 PM	N 5.1 ktunavailable	Unavailableunavailable	W 1.6 ft @ 10s
9 PM	NNE 5.6 ktunavailable	Unavailableunavailable	W 1.5 ft @ 10s
10 PM	NNE 5.4 ktunavailable	Unavailableunavailable	W 1.5 ft @ 10s
11 PM	NE 5.6 ktunavailable	Unavailableunavailable	W 1.5 ft @ 10s

12 AMUnavailable

WindN 2.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.2 ft @ 13s

1 AMUnavailable

WindNW 4.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.2 ft @ 12s

2 AMUnavailable

WindNW 4.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.4 ft @ 12s

3 AMUnavailable

WindNNW 3.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.4 ft @ 12s

4 AMUnavailable

WindNW 4.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 12s

5 AMUnavailable

WindNW 3.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 12s

6 AMUnavailable

WindNW 6 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 12s

7 AMUnavailable

WindNW 3.5 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 11s

8 AMUnavailable

WindWNW 4.1 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 11s

9 AMUnavailable

WindNW 7.4 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 11s

10 AMUnavailable

WindNW 8.7 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 11s

11 AMUnavailable

WindNW 9.5 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 11s

NoonUnavailable

WindNNW 11.3 ktunavailableTideUnavailableunavailableOffshore swellW 1.7 ft @ 11s

1 PMUnavailable

WindNNW 10.3 ktunavailableTideUnavailableunavailableOffshore swellW 1.7 ft @ 10s

2 PMUnavailable

WindNNW 12.4 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

3 PMUnavailable

WindN 12.2 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

4 PMUnavailable

WindN 9.9 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

5 PMUnavailable

WindN 9.5 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

6 PMUnavailable

WindNNE 10.3 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

7 PMUnavailable

WindNNE 5.8 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

8 PMUnavailable

WindN 5.1 ktunavailableTideUnavailableunavailableOffshore swellW 1.6 ft @ 10s

9 PMUnavailable

WindNNE 5.6 ktunavailableTideUnavailableunavailableOffshore swellW 1.5 ft @ 10s

10 PMUnavailable

WindNNE 5.4 ktunavailableTideUnavailableunavailableOffshore swellW 1.5 ft @ 10s

11 PMUnavailable

WindNE 5.6 ktunavailableTideUnavailableunavailableOffshore swellW 1.5 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. Reef break. Named beach/break area coordinate from published map; not a coastline survey. Coastline orientation unresolved; wind relationship withheld.

Mapped spot coordinate: 50.0861, -5.333.

Great Britain · Atlantic coast · Coastline orientation unresolved · Location provenance

Model request point: Porthleven (50.0861, -5.333). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 3/9 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 · UK · spot-level model point

National or regional meteorological marine bulletin
Warnings and official marine narrative where no structured surf feed exists; market adapter or station mapping not connectedUnavailableNo source time
Cefas WaveNet
No reusable WaveNet buoy has a verified exposure assignment to this spot; stations on other shores are not substituted.UnavailableNo source time
UK National Coastal Monitoring Real-Time Data
Wave buoys, tide gauges, and meteorology; market adapter or station mapping not connectedUnavailableNo source time
UK Hydrographic Office Tidal API
Tide predictions; 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
MET Norway Ocean Forecast · Porthleven · grid 50.0783,-5.3538 (2 km)
MET Norway Ocean Forecast · Porthleven · grid 50.0783,-5.3538 (2 km); Range across available hourly significant offshore wave forecasts for this local date; not breaking surf. Coastal shelter and nearshore transformations unresolvedCurrentSep 22, 10:08 PM GMT+1

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.