Surf Forecasts:
How big are the waves at Castlerock today (28 Jul):
- Morning surf: Morning surf (28 Jul, local time) - 2.5ft (0.7m), 9s period with WNW swell.
- Afternoon surf: Afternoon surf (28 Jul, local time) - 2ft (0.6m), 9s period with WNW swell.
- Evening surf: Evening surf (28 Jul, local time) - 2.5ft (0.8m), 9s period with WNW swell.
The current surf forecast for Castlerock at 12PM is: 0.7m 9s primary swell from a West-northwest direction and 0.3m 3s secondary swell from a West-northwest direction (forecast issued at 06:00am July 28). An open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 Jul) | 2.5ft (0.7m) | 9s |
| Afternoon (28 Jul) | 2ft (0.6m) | 9s |
| Evening (28 Jul) | 2.5ft (0.8m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 8mm), mostly falling on Wed morning. Very mild (max 19°C on Tue morning, min 11°C on Wed night). Winds increasing (calm on Wed morning, fresh winds from the WNW by Thu morning). | |||||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | |||||||||||||||||||||
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 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | NW 9 | NW 8 | NW 8 | NW 8 | WNW 8 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NW 6 | NW 6 | NW 6 | NW 6 | NW 6 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 75 | 55 | 71 | 68 | 52 | 68 | 90 | 70 | 70 | 79 | 74 | 70 | 54 | 43 | 85 | 103 | 94 | 62 | 113 | 95 | 46 | 42 | 26 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | glassy | glassy | on | glassy | glassy | on | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off |
High Tide | 6:18AM1.42m | 6:45PM1.66m | 6:48AM1.49m | 7:16PM1.75m | 7:17AM1.54m | 7:47PM1.82m | |||||||||||||||||
Low Tide | 12:41PM0.27m | 1:18AM0.35m | 1:12PM0.18m | 1:50AM0.31m | 1:41PM0.12m | ||||||||||||||||||
 |  |  |  | |  |  | | | | | | | |  |  | | | | | | | | |
 | 5:26 | — | — | — | — | — | — | — | 5:28 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — |
 | — | — | — | — | — | 9:38 | — | — | — | — | — | — | — | 9:37 | — | — | — | — | — | — | — | 9:35 | — |
mm | 4 | 2 | 1 | — | 1 | — | — | — | — | 1 | 3 | 1 | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 19 | 18 | 18 | 19 | 19 | 19 | 17 | 16 | 15 | 14 | 14 | 14 | 15 | 15 | 14 | 12 | 11 | 12 | 12 | 14 | 15 | 15 | 13 |
Feels °C | 18 | 16 | 17 | 17 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 15 | 15 | 14 | 13 | 10 | 8 | 8 | 6 | 7 | 10 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | NW 9 | NW 8 | NW 8 | NW 8 | WNW 8 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | N 8 | NNW 8 | NNW 8 | NW 6 | NW 6 |
| kJ | 75 | 55 | 71 | 68 | 52 | 68 | 90 | 70 | 70 | 79 | 74 | 70 | 54 | 43 | 85 | 103 | 94 | 62 | 35 | 24 | 13 | 42 | 24 |
Swell 2 Height (m) Direction Period (s) | NNW 9 | NNW 9 | NNW 9 | WNW 3 | N 9 | N 8 | N 8 | N 9 | N 9 | — | — | — | NNW 11 | NNW 10 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | — | — | WNW 8 | NNW 8 | NNW 8 |
| kJ | 16 | 8 | 8 | 2 | 6 | 6 | 6 | 6 | 1 | — | — | — | 24 | 42 | 26 | 23 | 19 | 21 | — | — | 6 | 13 | 26 |
Swell 3 Height (m) Direction Period (s) | — | — | — | N 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 8 | WNW 7 |
| kJ | — | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | W 3 | SW 3 | SW 3 | WSW 3 | — | — | — | — | — | — | — | — | — | — | — | WSW 3 | NW 6 | NW 6 | NW 6 | — | — |
| kJ | — | — | 4 | 1 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | 2 | 113 | 95 | 46 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 0 | 9 | 9 | 9 | 393 | 9 | 0 | 0 | 0 | 0 | 42 | 0 | 0 | 8 | 0 | 0 | 0 | 9 | 398 | 772 | 442 | 54 | 8 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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