- 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 12 am Thursday 23 Apr 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
9.3° C
(Which is normal for this time of year)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 9AM is: 0.1m 9s primary swell from a Northwest direction (forecast issued at 12:00am April 23). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Apr) | 0.5ft (0.1m) | 9s |
| Afternoon (23 Apr) | 0.5ft (0.1m) | 9s |
| Evening (23 Apr) | 0.5ft (0.1m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 5°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||||||||||
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 | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
E 4 | NW 10 | NW 9 | W 9 | W 9 | W 9 | W 9 | W 10 | W 8 | W 9 | W 9 | — | ESE 2 | N 7 | N 7 | N 7 | NW 6 | W 14 | N 9 | N 8 | NW 8 | NW 8 | NW 8 | NW 7 | |
16 | 4 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 0 | 0 | 1 | 1 | 1 | 2 | 4 | 2 | 1 | 3 | 3 | 2 | 2 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | off | |
High Tide | 10:40PM1.55m | 11:09AM1.17m | 00:04AM1.44m | 12:52PM1.04m | 1:59AM1.44m | 2:50PM1.07m | ||||||||||||||||||
Low Tide | 5:36AM0.50m | 5:26PM0.54m | 7:21AM0.59m | 7:01PM0.59m | 9:05AM0.55m | 8:37PM0.54m | ||||||||||||||||||
 | |  | |  | | |  |  | |  | | | | | | | | | | | | | | |
 | — | 6:05 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:01 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:45 | — | — | — | — | — | — | — | 8:47 | — | — | — | — | — | — | — | 8:50 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 7 | 6 | 5 | 7 | 10 | 12 | 11 | 11 | 11 | 11 | 10 | 11 | 14 | 15 | 14 | 12 | 11 | 10 | 10 | 11 | 15 | 16 | 16 | 15 |
0 | 0 | -1 | 2 | 4 | 7 | 7 | 8 | 8 | 8 | 7 | 8 | 10 | 11 | 11 | 8 | 7 | 6 | 6 | 8 | 12 | 13 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 10 | NW 9 | W 9 | W 9 | W 9 | W 9 | — | W 8 | W 9 | W 9 | — | — | N 7 | N 7 | — | NW 6 | NW 6 | NW 6 | NW 6 | NW 6 | NW 6 | NW 8 | NW 7 |
 kJ | 4 | 4 | 3 | 2 | 2 | 2 | 2 | — | 1 | 2 | 2 | — | — | 1 | 1 | — | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 10 | W 8 | — | — | — | — | — | — | N 7 | — | W 14 | N 9 | N 8 | NW 8 | NW 8 | NW 6 | N 6 |
| kJ | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | 1 | — | 4 | 2 | 1 | 3 | 3 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | ESE 3 | ESE 3 | E 3 | — | — | — | ESE 2 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 16 | 16 | 10 | 10 | 9 | 6 | 3 | 2 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 398 | 398 | 398 | 794 | 759 | 298 | 260 | 253 | 253 | 253 | 281 | 253 | 145 | 145 | 144 | 144 | 144 | 91 | 91 | 145 | 145 | 145 | 145 | 150 |
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