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Surf Forecasts:
Porthtowan surfForecast / Cornwall (North) / UK
48hr Weather and Surf, issued 5 am Monday 08 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Porthtowan surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porthtowan sea temperature is
12.2° C
(Which is slightly warmer than usual)How big are the waves at Porthtowan today?
The current surf forecast for Porthtowan at 1PM is: 3.0m 20s primary swell from a West direction and 4.0m 12s secondary swell from a West-southwest direction (forecast issued at 05:00am December 08). The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (08 Dec) | 6ft (1.8m) | 21s |
| Afternoon (08 Dec) | 18ft (5.5m) | 18s |
| Evening (08 Dec) | 16ft (5.0m) | 18s |
Table - waves today at Porthtowan. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 08 | Tuesday 09 | Wednesday 10 | Thu 11 | |||||||||||||||||||||
| 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 21 | 20 | 18 | 18 | 18 | 17 | 17 | 16 | 12 | 13 | 14 | 15 | 13 | 14 | 14 | 13 | 13 | 12 | 11 | 12 | 16 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3578 | 3502 | 2613 | 5853 | 20021 | 19296 | 15036 | 12423 | 9884 | 7339 | 8133 | 12154 | 12575 | 5593 | 8538 | 3585 | 3337 | 2638 | 2037 | 1617 | 1259 | 1117 | 2082 | 4297 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross- off | cross- off |
High Tide / height (m) | 7:04AM 6.46 | 7:31PM 5.99 | 7:54AM 6.15 | 8:21PM 5.60 | 8:46AM 5.78 | 9:16PM 5.22 | ||||||||||||||||||
Low Tide / height (m) | 1:35PM 0.38 | 1:52AM 0.68 | 2:27PM 0.71 | 2:44AM 1.02 | 3:21PM 1.07 | |||||||||||||||||||
Monday 08 | Tuesday 09 | Wednesday 10 | Thu 11 | |||||||||||||||||||||
| Sunrise | - | - | 8:06 | - | - | - | - | - | - | - | 8:07 | - | - | - | - | - | - | - | 8:07 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:16 | - | - | - |
 | |  |  | |  | | | | | | | | |  | | | |  | | | | | | |
Rain (mm) | 1 | 1 | - | 1 | - | - | 2 | 3 | 4 | - | 1 | 2 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 13 | 12 | 13 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 |
| Feels °C (?) | 5 | 6 | 6 | 8 | 7 | 8 | 6 | 4 | 2 | 4 | 3 | 4 | 5 | 7 | 6 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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