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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 pm Sunday 03 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
10.4° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 8PM is: 0.5m 10s primary swell from a Northwest direction and 0.6m 7s secondary swell from a North-northwest direction, 0.2m 3s secondary swell from a East-northeast direction (forecast issued at 12:00pm May 03). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (03 May) | 2.5ft (0.8m) | 10s |
| Afternoon (03 May) | 2ft (0.6m) | 10s |
| Evening (03 May) | 1.5ft (0.5m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Sun morning. Very mild (max 11°C on Mon afternoon, min 6°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 3 | Monday 4 | Tuesday 5 | Wed 6 | |||||||||||||||||||||
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 | 4 AM | 7 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NNW 6 | NW 9 | NW 9 | NW 9 | NW 9 | NW 9 | NNW 9 | NNW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 10 | NW 9 | NW 9 | NW 9 | NW 8 | |
133 | 74 | 74 | 45 | 49 | 52 | 41 | 41 | 40 | 40 | 50 | 52 | 43 | 57 | 57 | 77 | 79 | 77 | 75 | 110 | 101 | 95 | 74 | 57 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | on | on | on | on | on | cross-on | cross-off | off | cross-off | off | |
High Tide | 7:34AM1.63m | 7:50PM1.70m | 8:03AM1.55m | 8:22PM1.65m | 8:32AM1.45m | 8:55PM1.58m | ||||||||||||||||||
Low Tide | 1:49PM0.23m | 2:15AM0.28m | 2:17PM0.29m | 2:50AM0.37m | 2:45PM0.35m | 3:27AM0.48m | ||||||||||||||||||
 |  |  | |  | | | | | | | |  | | |  | | | | | | | | | |
 | 5:43 | — | — | — | — | — | 5:41 | — | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:37 | — |
 | — | — | — | 9:06 | — | — | — | — | — | — | — | 9:07 | — | — | — | — | — | — | — | 9:08 | — | — | — | 9:10 |
1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 9 | 9 | 10 | 10 | 9 | 8 | 7 | 7 | 9 | 10 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 8 | 8 | 8 | 7 | 6 | 6 |
7 | 6 | 8 | 7 | 5 | 4 | 3 | 3 | 5 | 6 | 6 | 5 | 5 | 6 | 5 | 3 | 3 | 3 | 4 | 5 | 5 | 4 | 3 | 2 | |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 10 | NW 10 | NNW 7 | NNW 7 | NNW 6 | NNW 5 | NNW 5 | NW 9 | NW 9 | NW 9 | NW 9 | NNW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 10 | NW 9 | NW 9 | NW 9 | NW 8 |
 kJ | 133 | 74 | 74 | 41 | 49 | 52 | 30 | 20 | 40 | 40 | 50 | 19 | 43 | 57 | 17 | 77 | 79 | 77 | 75 | 110 | 101 | 95 | 74 | 57 |
Swell 2 Height (m) Direction Period (s) | — | N 8 | NNW 7 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | N 8 | — | NNW 9 | — | NW 8 | NW 8 | NW 8 | WNW 8 | NW 11 | NW 11 | NW 10 | — | N 13 | ENE 4 | ENE 3 | N 11 |
| kJ | — | 30 | 29 | 45 | 45 | 42 | 41 | 41 | 1 | — | 7 | — | 18 | 18 | 18 | 7 | 5 | 18 | 26 | — | 3 | 2 | 2 | 20 |
Swell 3 Height (m) Direction Period (s) | — | — | — | ENE 3 | E 3 | — | N 8 | N 8 | — | — | — | — | — | — | — | — | NW 11 | — | — | — | — | N 13 | N 11 | ENE 3 |
| kJ | — | — | — | 1 | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | 5 | — | — | — | — | 3 | 10 | 1 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | ENE 3 | — | — | — | — | — | NNW 5 | NNW 4 | NNW 4 | NNW 9 | — | — | NW 8 | — | — | — | — | ENE 3 | ENE 4 | — | — | — |
| kJ | — | 1 | 1 | — | — | — | — | — | 13 | 11 | 7 | 52 | — | — | 57 | — | — | — | — | 1 | 4 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 2 | 16 | 40 | 114 | 114 | 71 | 341 | 27 | 131 | 300 | 334 | 334 | 9 | 9 | 144 | 144 | 66 | 63 | 16 | 2 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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