Surf Forecasts:
How big are the waves at Castlerock today (11 Jul):
- Morning surf: Morning surf (11 Jul, local time) - 2ft (0.6m), 10s period with WNW swell.
- Afternoon surf: Afternoon surf (11 Jul, local time) - 2.5ft (0.7m), 6s period with NNW swell.
- Evening surf: Evening surf (11 Jul, local time) - 1.5ft (0.4m), 9s period with WNW swell.
The current surf forecast for Castlerock at 8AM is: 0.6m 10s primary swell from a West-northwest direction and 0.7m 5s secondary swell from a North-northwest direction (forecast issued at 12:00am July 11). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Jul) | 2ft (0.6m) | 10s |
| Afternoon (11 Jul) | 2.5ft (0.7m) | 6s |
| Evening (11 Jul) | 1.5ft (0.4m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 20°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | ||||||||||||||||||||||
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) | WNW 10 | WNW 10 | WNW 10 | NW 10 | NW 9 | NNW 6 | NNW 6 | WNW 9 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 5 | WNW 8 | NNW 5 | WNW 7 | ENE 4 | WNW 7 | NW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 67 | 68 | 64 | 45 | 41 | 32 | 31 | 30 | 24 | 24 | 17 | 17 | 11 | 6 | 5 | 5 | 5 | 5 | 2 | 7 | 6 | 6 | 6 | 6 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | glassy | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on |
High Tide | 3:48AM1.47m | 4:27PM1.45m | 4:53AM1.54m | 5:24PM1.62m | 5:48AM1.60m | 6:15PM1.79m | ||||||||||||||||||
Low Tide | 10:18AM0.42m | 10:46PM0.41m | 11:19AM0.32m | 11:54PM0.28m | 12:11PM0.22m | |||||||||||||||||||
 | |  |  |  | | | | | | | | | | | |  | | | | | | | | |
 | — | 5:01 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 10:02 | — | — | — | — | — | — | — | 10:01 | — | — | — | — | — | — | — | 10:00 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 12 | 12 | 13 | 14 | 14 | 14 | 15 | 15 | 14 | 16 | 18 | 20 | 19 | 18 | 15 | 14 | 13 | 14 | 17 | 18 | 19 | 18 |
Feels °C | 9 | 9 | 9 | 9 | 11 | 12 | 13 | 13 | 15 | 16 | 13 | 15 | 16 | 18 | 17 | 17 | 13 | 12 | 11 | 12 | 14 | 15 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | N 4 | N 5 | WNW 10 | NW 10 | NW 9 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | ENE 4 | ENE 4 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
| kJ | 14 | 22 | 64 | 45 | 41 | 31 | 31 | 24 | 24 | 24 | 17 | 17 | 11 | 5 | 5 | 3 | 3 | 5 | 3 | 7 | 6 | 6 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | WNW 10 | WNW 10 | — | — | — | WNW 9 | WNW 9 | WNW 9 | NW 8 | NW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 7 | WNW 7 | NNW 5 | NW 7 | NW 6 | NW 5 | W 14 | W 14 | NW 10 |
| kJ | 67 | 68 | — | — | — | 32 | 31 | 30 | 18 | 17 | 13 | 12 | 6 | 6 | 5 | 5 | 5 | 3 | 2 | 1 | 1 | 4 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 7 | NW 5 | NW 6 | — | — | — | W 12 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 1 | 1 | — | — | — | 3 |
Wind waves Height (m) Direction Period (s) | — | — | NNW 5 | NNW 5 | NNW 5 | — | — | — | — | — | E 3 | ENE 3 | ENE 3 | ENE 3 | ENE 3 | ENE 3 | ENE 4 | — | — | ENE 4 | ENE 3 | ENE 3 | ENE 3 | ENE 2 |
| kJ | — | — | 24 | 35 | 37 | — | — | — | — | — | 1 | 1 | 2 | 3 | 2 | 2 | 4 | — | — | 2 | 2 | 2 | 1 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 114 | 107 | 114 | 114 | 78 | 78 | 74 | 66 | 16 | 16 | 16 | 40 | 40 | 40 | 390 | 328 | 328 | 328 | 328 | 336 | 254 | 251 | 97 | 40 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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