- Forecast
- Maps
- Live
- Weather State
- Spot Information
Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 pm Friday 29 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
11.8° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today (29 May):
- Afternoon surf: Afternoon surf (29 May, local time) - 1.5ft (0.5m), 9s period with WNW swell.
- Evening surf: Evening surf (29 May, local time) - 2.5ft (0.7m), 8s period with WNW swell.
The current surf forecast for Castlerock at 10PM is: 0.7m 8s primary swell from a West-northwest direction (forecast issued at 06:00pm May 29). The wind direction is predicted to be glassy.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 May) | - | - |
| Afternoon (29 May) | 1.5ft (0.5m) | 9s |
| Evening (29 May) | 2.5ft (0.7m) | 8s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Sat morning. Very mild (max 17°C on Fri afternoon, min 11°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||||||
Fri 29 | Saturday 30 | Sunday 31 | Mon 1 | |||||||||||||||||||||
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 | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
WNW 9 | WNW 8 | WNW 8 | NW 8 | WNW 8 | NW 8 | NW 7 | NW 7 | NW 7 | WNW 12 | WNW 12 | WNW 12 | WNW 13 | WNW 13 | WNW 12 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | W 12 | W 11 | W 11 | |
43 | 82 | 61 | 53 | 43 | 29 | 27 | 26 | 13 | 29 | 28 | 14 | 17 | 16 | 15 | 32 | 33 | 30 | 14 | 14 | 14 | 11 | 10 | 9 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross | glassy | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross | cross-on | cross-on | glassy | cross-off | off | cross-off | cross-off | off | |
High Tide | 5:59PM1.56m | 6:11AM1.55m | 6:31PM1.62m | 6:43AM1.54m | 7:04PM1.66m | 7:15AM1.51m | ||||||||||||||||||
Low Tide | 00:18AM0.33m | 12:30PM0.28m | 00:56AM0.31m | 1:02PM0.27m | 1:33AM0.32m | |||||||||||||||||||
 | |  |  |  |  |  | | | | | | | |  | | | | | | | | | | |
 | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:54 | — | — | — |
 | — | 9:51 | — | — | — | — | — | — | — | 9:52 | — | — | — | — | — | — | — | 9:53 | — | — | — | — | — | 9:54 |
— | — | — | — | — | — | 1 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | |
Temp °C | 17 | 17 | 15 | 13 | 12 | 13 | 12 | 11 | 13 | 14 | 14 | 13 | 12 | 12 | 14 | 15 | 15 | 15 | 13 | 12 | 12 | 12 | 12 | 15 |
13 | 14 | 14 | 10 | 9 | 10 | 9 | 7 | 11 | 12 | 12 | 11 | 10 | 9 | 10 | 11 | 12 | 12 | 13 | 10 | 10 | 10 | 10 | 14 | |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 8 | WNW 8 | NW 8 | WNW 8 | NW 8 | NW 7 | NW 7 | NW 7 | WNW 12 | WNW 12 | WNW 12 | WNW 13 | WNW 7 | WNW 12 | WNW 13 | WNW 13 | WNW 12 | NW 5 | NW 5 | WNW 5 | WNW 5 | WNW 5 | NW 5 |
 kJ | 43 | 82 | 61 | 53 | 43 | 29 | 27 | 26 | 13 | 29 | 28 | 14 | 17 | 5 | 15 | 32 | 33 | 30 | 7 | 7 | 3 | 3 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 16 | W 16 | W 10 | W 10 | NW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 13 | WNW 6 | N 9 | N 9 | N 8 | WNW 12 | WNW 12 | WNW 12 | W 12 | W 11 | W 11 |
| kJ | — | — | — | — | — | 5 | 5 | 2 | 8 | 8 | 5 | 5 | 5 | 16 | 4 | 2 | 2 | 1 | 14 | 14 | 14 | 11 | 10 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 11 | W 15 | NW 13 | N 10 | N 10 | N 10 | N 10 | N 10 | N 10 | N 10 | — | — | N 7 | N 7 | N 7 | N 7 | N 7 | N 6 |
| kJ | — | — | — | — | — | — | 2 | 4 | 7 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | — | — | 1 | 1 | 1 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | W 3 | W 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | WNW 6 | WNW 3 | — | — | — | — | — | — |
| kJ | 8 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 12 | 4 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 187 | 9 | 0 | 8 | 14 | 16 | 56 | 83 | 56 | 14 | 14 | 42 | 42 | 42 | 162 | 300 | 390 | 187 | 16 | 40 | 40 | 40 | 40 | 42 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest