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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 am Friday 22 May 2026 BSTForecast 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
11.3° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 2PM is: 0.2m 11s primary swell from a West direction (forecast issued at 06:00am May 22). An open ocean swell of 0.2m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 0.5ft (0.2m) | 12s |
| Afternoon (22 May) | 0.5ft (0.2m) | 12s |
| Evening (22 May) | 0.5ft (0.2m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Warm (max 21°C on Sun afternoon, min 11°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | Mon 25 | |||||||||||||||||||||
4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
W 11 | W 11 | W 12 | W 11 | W 12 | W 12 | W 12 | W 11 | W 12 | WNW 6 | WNW 6 | WNW 6 | WNW 8 | WNW 9 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 15 | NW 14 | |
9 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 11 | 4 | 4 | 4 | 6 | 9 | 18 | 20 | 36 | 34 | 33 | 20 | 19 | 20 | 150 | 211 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | cross-off | off | off | off | off | cross-off | cross | glassy | off | off | off | off | off | off | off | on | cross-off | off | |
High Tide | 11:02AM1.19m | 11:57PM1.59m | 12:22PM1.09m | 1:22AM1.55m | 1:56PM1.08m | |||||||||||||||||||
Low Tide | 5:43AM0.45m | 5:20PM0.41m | 7:00AM0.52m | 6:30PM0.46m | 8:18AM0.53m | 7:46PM0.49m | ||||||||||||||||||
 |  | | | |  |  |  | |  | | | | |  | | | | |  | | | | | |
 | 5:07 | — | — | — | — | — | — | — | 5:05 | — | — | — | — | — | — | — | 5:05 | — | — | — | — | — | — | 5:03 |
 | — | — | — | — | — | 9:39 | — | — | — | — | — | — | — | 9:42 | — | — | — | — | — | — | — | 9:43 | — | 9:45 |
— | — | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 13 | 12 | 15 | 18 | 19 | 17 | 14 | 13 | 11 | 11 | 13 | 16 | 18 | 17 | 16 | 14 | 13 | 13 | 14 | 18 | 21 | 18 | 16 | 17 |
9 | 9 | 12 | 15 | 16 | 14 | 11 | 10 | 8 | 8 | 10 | 12 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 16 | 17 | 16 | 16 | 15 | |
Swell 1 Height (m) Direction Period (s) | WNW 7 | W 11 | ESE 4 | ESE 3 | W 12 | W 12 | W 12 | W 11 | W 6 | WNW 6 | WNW 6 | WNW 6 | WNW 8 | WNW 9 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 15 | NW 14 |
 kJ | 4 | 10 | 3 | 1 | 11 | 11 | 11 | 10 | 3 | 4 | 4 | 4 | 6 | 9 | 18 | 20 | 36 | 34 | 33 | 20 | 19 | 20 | 150 | 211 |
Swell 2 Height (m) Direction Period (s) | W 11 | WNW 6 | W 12 | W 11 | E 3 | — | ESE 5 | E 4 | W 12 | W 10 | W 12 | W 11 | W 11 | — | — | — | — | — | — | — | NW 17 | NW 16 | SE 4 | — |
| kJ | 9 | 4 | 10 | 10 | 1 | — | 2 | 1 | 11 | 2 | 3 | 2 | 2 | — | — | — | — | — | — | — | 12 | 10 | 1 | — |
Swell 3 Height (m) Direction Period (s) | N 8 | N 8 | NW 6 | NW 6 | NW 6 | NW 6 | NW 6 | N 6 | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | NW 12 | — | — |
| kJ | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — |
Wind waves Height (m) Direction Period (s) | SE 2 | SE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 83 | 56 | 83 | 42 | 42 | 42 | 42 | 42 | 41 | 40 | 84 | 42 | 63 | 42 | 40 | 40 | 40 | 14 | 40 | 42 | 42 | 42 | 0 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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