Surf Forecasts:
How big are the waves at Castlerock today (12 Sep):
- Morning surf: Morning surf (12 Sep, local time) - 4.5ft (1.4m), 13s period with NW swell.
- Afternoon surf: Afternoon surf (12 Sep, local time) - 5ft (1.6m), 13s period with NW swell.
- Evening surf: Evening surf (12 Sep, local time) - 5ft (1.6m), 12s period with NW swell.
The current surf forecast for Castlerock at 7PM is: 1.6m 12s primary swell from a Northwest direction (forecast issued at 12:00pm September 12). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Sep) | 4.5ft (1.4m) | 13s |
| Afternoon (12 Sep) | 5ft (1.6m) | 13s |
| Evening (12 Sep) | 5ft (1.6m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Mon afternoon. Very mild (max 18°C on Sun afternoon, min 12°C on Sat night). Winds increasing (calm on Sun morning, fresh winds from the W by Mon night). | |||||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | |||||||||||||||||||
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 |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | NW 12 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 11 | WNW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 666 | 699 | 865 | 741 | 565 | 546 | 427 | 298 | 293 | 220 | 192 | 136 | 113 | 87 | 65 | 39 | 38 | 37 | 29 | 65 | 44 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross-on | cross | cross-off | glassy | glassy | cross-off | glassy | glassy | cross-off | off | off | off | off | off | off | off | cross-off | off |
High Tide | 7:21AM1.71m | 7:44PM2.04m | 7:53AM1.72m | 8:15PM1.93m | 8:23AM1.69m | 8:45PM1.78m | |||||||||||||||
Low Tide | 1:33PM-0.05m | 2:11AM0.08m | 2:06PM-0.01m | 2:38AM0.15m | 2:39PM0.09m | ||||||||||||||||
 |  | |  |  |  | |  | | | | | | |  | | | | | | | |
 | 6:52 | — | — | — | — | — | 6:54 | — | — | — | — | — | — | — | 6:56 | — | — | — | — | — | — |
 | — | — | — | 7:52 | — | — | — | — | — | — | — | 7:50 | — | — | — | — | — | — | — | 7:47 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | — |
Temp °C | 17 | 16 | 15 | 14 | 13 | 12 | 12 | 12 | 12 | 15 | 17 | 18 | 17 | 16 | 14 | 16 | 16 | 18 | 18 | 18 | 17 |
Feels °C | 14 | 12 | 12 | 12 | 12 | 11 | 11 | 12 | 11 | 15 | 17 | 17 | 15 | 14 | 12 | 14 | 14 | 16 | 17 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 11 | WNW 11 |
| kJ | 666 | 699 | 865 | 741 | 565 | 546 | 427 | 298 | 293 | 220 | 192 | 136 | 113 | 87 | 65 | 39 | 38 | 37 | 29 | 65 | 44 |
Swell 2 Height (m) Direction Period (s) | SE 4 | — | — | — | — | — | — | — | — | — | N 16 | — | N 14 | N 14 | N 14 | N 14 | N 13 | N 13 | N 13 | N 12 | N 12 |
| kJ | 2 | — | — | — | — | — | — | — | — | — | 5 | — | 4 | 15 | 14 | 14 | 31 | 30 | 13 | 26 | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 11 | — | SE 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 12 | — | 1 |
Wind waves Height (m) Direction Period (s) | SW 3 | W 3 | — | — | — | — | — | — | — | — | — | — | — | ESE 2 | ESE 3 | — | — | SSE 2 | SSE 3 | — | — |
| kJ | 4 | 7 | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | 1 | 1 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 387 | 187 | 9 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 8 | 9 | 8 |
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