Surf Forecasts:
How big are the waves at Castlerock today (27 Jul):
- Morning surf: Morning surf (27 Jul, local time) - 3.5ft (1.1m), 10s period with NW swell.
- Afternoon surf: Afternoon surf (27 Jul, local time) - 3ft (0.9m), 10s period with NW swell.
- Evening surf: Evening surf (27 Jul, local time) - 2.5ft (0.8m), 10s period with WNW swell.
The current surf forecast for Castlerock at 3PM is: 0.9m 10s primary swell from a Northwest direction and 0.3m 10s secondary swell from a North-northwest direction (forecast issued at 12:00pm July 27). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Jul) | 3.5ft (1.1m) | 10s |
| Afternoon (27 Jul) | 3ft (0.9m) | 10s |
| Evening (27 Jul) | 2.5ft (0.8m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 12mm), heaviest on Mon night. Very mild (max 19°C on Tue morning, min 11°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue morning, light winds from the NNW by Wed afternoon). | |||||||||||||||||||||
Mon 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||||||
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 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 200 | 196 | 142 | 139 | 94 | 90 | 75 | 55 | 55 | 84 | 67 | 68 | 70 | 68 | 49 | 40 | 39 | 45 | 45 | 32 | 31 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-on | on | cross-on | cross |
High Tide | 6:12PM1.55m | 6:18AM1.42m | 6:45PM1.66m | 6:48AM1.49m | 7:16PM1.75m | ||||||||||||||||
Low Tide | 12:07PM0.38m | 00:44AM0.41m | 12:41PM0.27m | 1:18AM0.35m | 1:12PM0.18m | ||||||||||||||||
 |  | | |  | | |  | | | |  |  | | | | | | | |  | |
 | 5:24 | — | — | — | — | — | 5:26 | — | — | — | — | — | — | — | 5:28 | — | — | — | — | — | — |
 | — | — | — | 9:39 | — | — | — | — | — | — | — | 9:38 | — | — | — | — | — | — | — | 9:37 | — |
mm | — | — | — | — | 1 | 1 | 2 | 1 | — | — | 1 | 2 | — | 1 | — | — | — | 1 | 2 | — | — |
Temp °C | 15 | 15 | 16 | 18 | 16 | 16 | 17 | 18 | 18 | 19 | 18 | 17 | 17 | 16 | 16 | 16 | 17 | 15 | 15 | 15 | 13 |
Feels °C | 13 | 13 | 15 | 17 | 16 | 15 | 16 | 16 | 14 | 16 | 17 | 16 | 16 | 15 | 15 | 15 | 15 | 13 | 15 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 8 |
| kJ | 200 | 196 | 142 | 139 | 94 | 90 | 75 | 55 | 55 | 84 | 67 | 68 | 70 | 68 | 49 | 40 | 39 | 45 | 45 | 32 | 31 |
Swell 2 Height (m) Direction Period (s) | N 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 9 | N 8 | N 8 | NNW 11 | NNW 10 |
| kJ | 17 | 18 | 18 | 19 | 19 | 17 | 16 | 8 | 8 | 6 | 6 | 6 | 6 | 6 | 6 | 1 | 1 | 1 | 1 | 12 | 20 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 8 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | S 2 | S 3 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 350 | 404 | 9 | 4 | 0 | 0 | 8 | 14 | 42 | 42 | 84 | 76 | 42 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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