Surf Forecasts:
How big are the waves at Castlerock today (10 Jul):
- Morning surf: Morning surf (10 Jul, local time) - 1.5ft (0.5m), 11s period with NW swell.
- Afternoon surf: Afternoon surf (10 Jul, local time) - 2ft (0.6m), 10s period with NW swell.
- Evening surf: Evening surf (10 Jul, local time) - 2ft (0.6m), 10s period with WNW swell.
The current surf forecast for Castlerock at 8AM is: 0.4m 12s primary swell from a Northwest direction and 0.3m 9s secondary swell from a West-northwest direction (forecast issued at 12:00am July 10). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Jul) | 1.5ft (0.5m) | 11s |
| Afternoon (10 Jul) | 2ft (0.6m) | 10s |
| Evening (10 Jul) | 2ft (0.6m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 20°C on Sun afternoon, min 11°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | ||||||||||||||||||||||
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 9 | WNW 9 | NW 12 | WNW 11 | WNW 11 | NW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | NW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | NW 8 | NW 8 | WNW 8 | WNW 8 | NW 5 | WNW 8 | WNW 7 | WNW 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 16 | 15 | 35 | 81 | 75 | 82 | 65 | 65 | 67 | 68 | 64 | 45 | 33 | 32 | 31 | 30 | 18 | 17 | 13 | 12 | 6 | 6 | 5 | 5 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | on | on | on | on | cross-on | cross-on | cross-on | on | on | on | on | on | on | glassy | off | cross-off | cross-off | cross | cross | cross | cross |
High Tide | 2:30AM1.44m | 3:19PM1.30m | 3:48AM1.47m | 4:27PM1.45m | 4:53AM1.54m | 5:24PM1.62m | ||||||||||||||||||
Low Tide | 9:06AM0.48m | 9:22PM0.51m | 10:18AM0.42m | 10:46PM0.41m | 11:19AM0.32m | |||||||||||||||||||
 | |  | | | |  | |  | | | | | | | | | | | |  | | | | |
 | — | 5:00 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 10:04 | — | — | — | — | — | — | — | 10:02 | — | — | — | — | — | — | — | 10:01 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 15 | 15 | 15 | 14 | 13 | 12 | 12 | 11 | 12 | 13 | 14 | 15 | 16 | 16 | 16 | 16 | 14 | 16 | 18 | 20 | 20 | 19 |
Feels °C | 17 | 16 | 16 | 14 | 14 | 11 | 10 | 9 | 9 | 8 | 10 | 11 | 13 | 14 | 15 | 16 | 17 | 16 | 13 | 15 | 16 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | NW 12 | WNW 11 | WNW 11 | NW 10 | WNW 10 | WNW 10 | N 5 | N 5 | N 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NW 5 | NNW 5 | NNW 5 | NNW 5 |
| kJ | 16 | 15 | 35 | 81 | 75 | 82 | 65 | 65 | 22 | 32 | 33 | 28 | 29 | 23 | 22 | 15 | 15 | 15 | 11 | 10 | 6 | 5 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | NW 14 | NW 12 | WNW 9 | — | — | — | — | — | WNW 10 | WNW 10 | WNW 10 | NW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | NW 8 | NW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 7 |
| kJ | 7 | 6 | 15 | — | — | — | — | — | 67 | 68 | 64 | 45 | 33 | 32 | 31 | 30 | 18 | 17 | 13 | 12 | 6 | 6 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ENE 4 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNW 2 | NNW 4 | N 4 | — | — | — | — | — | — | — | — | — | — | — | E 4 | E 3 | E 3 | E 3 | — |
| kJ | — | — | — | — | — | 1 | 5 | 13 | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 16 | 27 | 107 | 114 | 114 | 76 | 71 | 71 | 78 | 66 | 66 | 66 | 63 | 63 | 16 | 16 | 16 | 40 | 40 | 40 | 97 | 334 | 328 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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