Surf Forecasts:
How big are the waves at Castlerock today (04 Aug):
- Afternoon surf: Afternoon surf (04 Aug, local time) - 1.5ft (0.4m), 8s period with NNW swell.
- Evening surf: Evening surf (04 Aug, local time) - 1.5ft (0.4m), 9s period with NNW swell.
The current surf forecast for Castlerock at 11PM is: 0.4m 9s primary swell from a North-northwest direction and 0.4m 3s secondary swell from a West-northwest direction (forecast issued at 06:00pm August 04). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 Aug) | - | - |
| Afternoon (04 Aug) | 1.5ft (0.4m) | 8s |
| Evening (04 Aug) | 1.5ft (0.4m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 9mm), mostly falling on Wed morning. Very mild (max 17°C on Tue afternoon, min 12°C on Wed night). Winds increasing (calm on Tue afternoon, strong winds from the WNW by Wed afternoon). | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | |||||||||||||||||
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 |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 10 | NNW 10 | NW 6 | NW 8 | NW 8 | NW 9 | NNW 9 | NNW 8 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NW 6 | NNW 6 | NW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 19 | 12 | 35 | 34 | 37 | 38 | 146 | 481 | 771 | 1034 | 848 | 508 | 310 | 168 | 107 | 60 | 37 | 22 | 15 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross | cross | cross-off | cross-off | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-off | cross-off |
High Tide | 10:33PM1.64m | 10:49AM1.36m | 11:20PM1.51m | 11:47AM1.27m | |||||||||||||||
Low Tide | 4:06PM0.30m | 4:58AM0.43m | 4:51PM0.41m | 5:49AM0.51m | 5:54PM0.53m | ||||||||||||||
 | |  | | |  |  | | | |  |  | |  | | | | |  | |
 | — | — | — | — | 5:41 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — |
 | — | 9:24 | — | — | — | — | — | — | — | 9:22 | — | — | — | — | — | — | — | 9:21 | — |
mm | — | — | — | — | — | — | 1 | 2 | 1 | 2 | 2 | 1 | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 13 | 15 | 15 | 15 | 14 |
Feels °C | 18 | 15 | 11 | 10 | 9 | 9 | 6 | 6 | 6 | 6 | 7 | 8 | 7 | 7 | 9 | 11 | 11 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NW 5 | NW 6 | — | — | — | — | — | — | — | NNW 7 | W 10 | NNW 6 | NW 6 | NNW 6 | NW 6 |
| kJ | 19 | 12 | 35 | 34 | 18 | 30 | — | — | — | — | — | — | — | 168 | 2 | 60 | 37 | 22 | 15 |
Swell 2 Height (m) Direction Period (s) | E 4 | E 3 | — | — | NNW 10 | NNW 10 | — | — | — | — | — | — | — | W 10 | — | W 10 | W 10 | W 10 | W 10 |
| kJ | 1 | 1 | — | — | 37 | 38 | — | — | — | — | — | — | — | 2 | — | 2 | 2 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | NW 7 | NW 7 | — | — | NNW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 2 | 2 | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WNW 3 | WNW 4 | WSW 3 | SW 3 | NW 6 | NW 8 | NW 8 | NW 9 | NNW 9 | NNW 8 | NNW 7 | — | NNW 7 | — | — | — | — |
| kJ | — | — | 2 | 11 | 1 | 2 | 146 | 481 | 771 | 1034 | 848 | 508 | 310 | — | 107 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 270 | 270 | 266 | 180 | 292 | 323 | 356 | 366 | 378 | 772 | 629 | 629 | 349 | 187 | 303 | 282 | 282 | 282 | 194 |
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)
Latest Updates
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