Surf Forecasts:
How big are the waves at Castlerock today (17 Jul):
- Morning surf: Morning surf (17 Jul, local time) - 3ft (0.9m), 6s period with NNW swell.
- Afternoon surf: Afternoon surf (17 Jul, local time) - 4ft (1.2m), 6s period with NNW swell.
- Evening surf: Evening surf (17 Jul, local time) - 4ft (1.2m), 6s period with NNW swell.
The current surf forecast for Castlerock at 6AM is: 0.3m 11s primary swell from a Northwest direction and 0.1m 9s secondary swell from a West direction, 0.6m 5s secondary swell from a North-northwest direction (forecast issued at 12:00am July 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Jul) | 3ft (0.9m) | 6s |
| Afternoon (17 Jul) | 4ft (1.2m) | 6s |
| Evening (17 Jul) | 4ft (1.2m) | 6s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Thu night, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | ||||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | NW 11 | NW 11 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 19 | 19 | 22 | 62 | 103 | 107 | 101 | 147 | 129 | 139 | 108 | 87 | 90 | 87 | 100 | 107 | 99 | 99 | 85 | 70 | 70 | 53 | 40 | 40 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:45AM1.55m | 9:18PM2.00m | 9:25AM1.48m | 10:00PM1.89m | 10:04AM1.39m | |||||||||||||||||||
Low Tide | 3:15AM0.13m | 3:00PM0.02m | 3:59AM0.22m | 3:40PM0.08m | 4:40AM0.32m | 4:21PM0.19m | ||||||||||||||||||
 | |  |  | |  | |  | | | | | | | | | |  | | | | | | | |
 | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:55 | — | — | — | — | — | — | — | 9:53 | — | — | — | — | — | — | — | 9:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 13 | 13 | 13 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 13 | 14 | 15 | 14 | 13 | 12 | 12 | 13 | 14 | 14 | 14 | 13 |
Feels °C | 13 | 12 | 11 | 10 | 10 | 10 | 10 | 9 | 8 | 8 | 8 | 7 | 8 | 10 | 12 | 11 | 10 | 9 | 9 | 10 | 11 | 10 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | N 6 | NW 8 | NW 8 | NW 8 | — | — | — | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NW 12 | NW 12 | NW 12 | WNW 12 | NW 12 |
| kJ | 19 | 19 | 18 | 17 | 16 | 15 | 14 | 19 | 52 | 11 | 16 | 16 | — | — | — | 107 | 99 | 99 | 85 | 6 | 6 | 5 | 14 | 5 |
Swell 2 Height (m) Direction Period (s) | N 3 | W 9 | — | — | — | — | — | — | NW 9 | — | — | — | — | — | — | — | W 14 | NW 13 | W 9 | NW 9 | W 9 | W 8 | W 8 | W 8 |
| kJ | 1 | 2 | — | — | — | — | — | — | 19 | — | — | — | — | — | — | — | 4 | 7 | 2 | 3 | 2 | 1 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | NW 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 13 | — | — | — | — | — |
| kJ | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NNW 4 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | — | — | — | — | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 |
| kJ | — | 5 | 22 | 62 | 103 | 107 | 101 | 147 | 129 | 139 | 108 | 87 | 90 | 87 | 100 | — | — | — | — | 70 | 70 | 53 | 40 | 40 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 334 | 251 | 382 | 382 | 382 | 398 | 707 | 300 | 300 | 292 | 313 | 334 | 885 | 266 | 334 | 76 | 107 | 74 | 110 | 131 | 54 | 54 | 266 | 131 |
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