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Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 pm Friday 05 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castlerock sea temperature is
11.0° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 7PM is: 1.1m 14s primary swell from a Northwest direction (forecast issued at 05:00pm December 05). An open ocean swell of 2.3m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Dec) | - | - |
| Afternoon (05 Dec) | 4.5ft (1.3m) | 15s |
| Evening (05 Dec) | 3ft (0.9m) | 14s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 05 | Saturday 06 | Sunday 07 | Monday 08 | |||||||||||||||||||||
| 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 | 3 AM | 6 AM | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 14 | 14 | 13 | 13 | 13 | 19 | 19 | 18 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 7 | 8 | 13 | 22 | 21 | 19 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 695 | 459 | 331 | 261 | 205 | 170 | 315 | 742 | 943 | 779 | 620 | 439 | 405 | 297 | 226 | 178 | 113 | 101 | 67 | 95 | 55 | 128 | 517 | 817 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | off | off | off | off | off | off | off | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off |
High Tide / height (m) | 6:05PM 1.78 | 6:28AM 1.92 | 6:50PM 1.69 | 7:14AM 1.93 | 7:34PM 1.56 | 8:02AM 1.88 | ||||||||||||||||||
Low Tide / height (m) | 12:07PM 0.07 | 12:22AM 0.10 | 1:00PM 0.08 | 1:04AM 0.12 | 1:53PM 0.15 | 1:47AM 0.16 | ||||||||||||||||||
Friday 05 | Saturday 06 | Sunday 07 | Monday 08 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:34 | - | - | - | - | - | - | - | 8:37 | - | - | - | - | - | - | - | 8:37 | - |
| Sunset | 4:00 | - | - | - | - | - | - | - | 3:59 | - | - | - | - | - | - | - | 3:59 | - | - | - | - | - | - | - |
 |  |  |  | |  |  |  |  |  | | | | |  | |  | | | | | | | | |
Rain (mm) | 7 | 7 | - | 1 | 1 | - | - | - | - | - | - | - | - | - | 2 | 5 | 14 | 2 | - | - | 1 | - | - | - |
| Temp. °C | 8 | 9 | 10 | 10 | 9 | 8 | 8 | 9 | 10 | 10 | 10 | 10 | 9 | 8 | 9 | 11 | 9 | 10 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels °C (?) | -4 | -1 | 6 | 7 | 5 | 4 | 4 | 6 | 7 | 6 | 6 | 5 | 5 | 3 | 4 | 4 | -1 | 0 | 1 | 3 | 3 | 2 | 2 | 2 |
- 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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