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Surf Forecasts:
Porthtowan surfForecast / Cornwall (North) / UK
48hr Weather and Surf, issued 11 pm Tuesday 09 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
12.3° C
(Which is slightly warmer than usual)How big are the waves at Porthtowan today?
The current surf forecast for Porthtowan at 3AM is: 5.0m 13s primary swell from a West-southwest direction and 3.5m 13s secondary swell from a West direction (forecast issued at 11:00pm December 09). The wind direction is predicted to be cross-shore and the swell rating is 11.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Dec) | 13ft (4.0m) | 12s |
| Afternoon (10 Dec) | 8ft (2.4m) | 12s |
| Evening (10 Dec) | 8ft (2.5m) | 15s |
Table - waves today at Porthtowan. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 10 | Thursday 11 | Friday 12 | ||||||||||||||||||||||
| 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 | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 19 | 19 | 18 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 13383 | 10009 | 7904 | 6030 | 4786 | 2005 | 1672 | 1616 | 3067 | 5054 | 4916 | 2466 | 3834 | 4221 | 5778 | 9420 | 9030 | 6770 | 5473 | 7542 | 7587 | 17651 | 19288 | 17782 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | on | cross- on | on | on | on | cross- on | cross |
High Tide / height (m) | 8:21PM 5.60 | 8:46AM 5.78 | 9:16PM 5.22 | 9:41AM 5.40 | 10:15PM 4.90 | 10:43AM 5.08 | ||||||||||||||||||
Low Tide / height (m) | 2:44AM 1.02 | 3:21PM 1.07 | 3:38AM 1.36 | 4:19PM 1.39 | 4:38AM 1.65 | 5:20PM 1.63 | ||||||||||||||||||
Wednesday 10 | Thursday 11 | Friday 12 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:07 | - | - | - | - | - | - | - | 8:08 | - | - | - | - | - | - | - | 8:10 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - | 4:16 | - |
 | | | |  | |  | | | | | | | | |  |  | |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - |
| Temp. °C | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 9 | 9 | 9 | 9 | 10 | 10 | 10 |
| Feels °C (?) | 5 | 5 | 4 | 4 | 5 | 5 | 6 | 7 | 5 | 4 | 4 | 3 | 4 | 5 | 5 | 6 | 7 | 2 | 5 | 4 | 5 | 7 | 7 | 8 |
- 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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