Surf Forecasts:
How big are the waves at Castlerock today (23 Jul):
- Afternoon surf: Afternoon surf (23 Jul, local time) - 3ft (0.9m), 7s period with NNW swell.
- Evening surf: Evening surf (23 Jul, local time) - 2.5ft (0.8m), 7s period with NNW swell.
The current surf forecast for Castlerock at 12AM is: 0.7m 7s primary swell from a North-northwest direction and 0.1m 9s secondary swell from a West direction (forecast issued at 06:00pm July 22). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Jul) | - | - |
| Afternoon (23 Jul) | 3ft (0.9m) | 7s |
| Evening (23 Jul) | 2.5ft (0.8m) | 7s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 20°C on Fri afternoon, min 12°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Wed 22 | Thursday 23 | Friday 24 | |||||||||||||||||
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 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NW 6 | NNW 6 | NW 7 | NW 11 | NW 10 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 75 | 75 | 59 | 41 | 40 | 38 | 29 | 28 | 34 | 27 | 27 | 40 | 173 | 181 | 188 | 182 | 201 | 201 | 176 |
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 | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off |
High Tide | 1:32AM1.21m | 2:27PM1.15m | 3:07AM1.16m | 3:55PM1.22m | |||||||||||||||
Low Tide | 7:05PM0.62m | 8:00AM0.66m | 8:37PM0.69m | 9:20AM0.65m | |||||||||||||||
 | |  | |  |  |  | | | | | | | | | | | | | |
 | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — |
 | — | 9:49 | — | — | — | — | — | — | — | 9:46 | — | — | — | — | — | — | — | 9:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 13 | 12 | 12 | 12 | 16 | 19 | 20 | 18 | 14 |
Feels °C | 12 | 11 | 12 | 11 | 11 | 11 | 10 | 12 | 11 | 11 | 10 | 9 | 9 | 9 | 12 | 14 | 15 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 9 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | W 8 | W 9 | NW 7 | NW 7 | NW 10 | NW 10 | NW 9 | — | — | — | NW 8 |
| kJ | 2 | 2 | 2 | 41 | 40 | 38 | 29 | 28 | 1 | 1 | 27 | 36 | 173 | 181 | 188 | — | — | — | 176 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 9 | W 9 | W 9 | W 8 | W 9 | — | — | NW 10 | NW 11 | NW 10 | — | — | — | — | — | — |
| kJ | — | — | — | 2 | 2 | 1 | 1 | 2 | — | — | 4 | 40 | 69 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 8 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 7 | — | — | — | — | — | NW 6 | NNW 6 | — | — | — | — | W 3 | NW 9 | NW 8 | NW 8 | — |
| kJ | 75 | 75 | 59 | — | — | — | — | — | 34 | 27 | — | — | — | — | 2 | 182 | 201 | 201 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 54 | 339 | 131 | 54 | 42 | 42 | 144 | 2350 | 2454 | 378 | 187 | 0 | 0 | 9 | 419 | 71 | 1263 | 1263 | 27 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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