Surf Forecasts:
How big are the waves at Castlerock today (22 Jul):
- Morning surf: Morning surf (22 Jul, local time) - 3.5ft (1.0m), 7s period with NNW swell.
- Afternoon surf: Afternoon surf (22 Jul, local time) - 3ft (0.9m), 7s period with NNW swell.
- Evening surf: Evening surf (22 Jul, local time) - 2.5ft (0.8m), 7s period with NNW swell.
The current surf forecast for Castlerock at 3AM is: 1.1m 6s primary swell from a North-northwest direction and 0.1m 9s secondary swell from a Northwest direction (forecast issued at 06:00pm July 21). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Jul) | 3.5ft (1.0m) | 7s |
| Afternoon (22 Jul) | 3ft (0.9m) | 7s |
| Evening (22 Jul) | 2.5ft (0.8m) | 7s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 18°C on Fri morning, min 11°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||
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 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NW 7 | NW 6 | NW 6 | NW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 77 | 77 | 74 | 77 | 82 | 96 | 91 | 79 | 77 | 75 | 59 | 41 | 40 | 30 | 29 | 21 | 20 | 19 | 27 |
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-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 00:19AM1.35m | 12:45PM1.16m | 1:32AM1.21m | 2:27PM1.15m | |||||||||||||||
Low Tide | 5:58PM0.49m | 6:55AM0.61m | 7:05PM0.62m | 8:00AM0.66m | 8:37PM0.69m | ||||||||||||||
 | |  | | | |  | | | | | | |  | | | | | | |
 | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — |
 | — | 9:50 | — | — | — | — | — | — | — | 9:49 | — | — | — | — | — | — | — | 9:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 11 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 13 | 14 | 15 | 16 | 15 | 13 |
Feels °C | 7 | 8 | 6 | 8 | 8 | 9 | 10 | 10 | 11 | 11 | 12 | 12 | 12 | 11 | 12 | 13 | 13 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 9 | WNW 9 | W 9 | NW 9 | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NW 7 | W 8 | NW 8 | NW 6 |
| kJ | 9 | 9 | 8 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 41 | 40 | 30 | 29 | 21 | 1 | 3 | 27 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 9 | W 9 | W 9 | W 8 | W 8 | — | — | NW 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 1 | 1 | — | — | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | — | — | — | — | — | NW 6 | NW 6 | — |
| kJ | 77 | 77 | 74 | 77 | 82 | 96 | 91 | 79 | 77 | 75 | 59 | — | — | — | — | — | 20 | 19 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1263 | 1263 | 286 | 286 | 286 | 286 | 131 | 131 | 1295 | 54 | 54 | 42 | 42 | 42 | 42 | 442 | 442 | 342 | 187 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
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