Surf Forecasts:
How big are the waves at Castlerock today (17 Jun):
- Morning surf: Morning surf (17 Jun, local time) - 1ft (0.3m), 11s period with WNW swell.
- Afternoon surf: Afternoon surf (17 Jun, local time) - 1ft (0.3m), 10s period with WNW swell.
- Evening surf: Evening surf (17 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
The current surf forecast for Castlerock at 5AM is: 0.2m 12s primary swell from a West-northwest direction (forecast issued at 12:00am June 17). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Jun) | 1ft (0.3m) | 11s |
| Afternoon (17 Jun) | 1ft (0.3m) | 10s |
| Evening (17 Jun) | 1.5ft (0.4m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 29mm), heaviest during Fri afternoon. Very mild (max 18°C on Thu afternoon, min 12°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
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 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 9 | WNW 9 | WNW 8 | NW 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 14 | 13 | 25 | 23 | 22 | 20 | 32 | 33 | 33 | 33 | 32 | 33 | 39 | 39 | 38 | 35 | 33 | 32 | 30 | 14 | 15 | 15 | 13 | 15 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | off | off | cross-off | cross-on | cross | cross-off | cross-off | off | off | off | cross-on | cross-on | cross |
High Tide | 8:17AM1.61m | 8:46PM1.94m | 9:03AM1.50m | 9:36PM1.90m | 9:49AM1.38m | |||||||||||||||||||
Low Tide | 2:36AM0.12m | 2:33PM0.12m | 3:30AM0.18m | 3:18PM0.14m | 4:25AM0.28m | 4:05PM0.19m | ||||||||||||||||||
 |  |  |  | |  | | | | |  | | | | | | | | | | |  | | | |
 | — | 4:46 | — | — | — | — | — | — | — | 4:46 | — | — | — | — | — | — | — | 4:46 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 10:08 | — | — | — | — | — | — | — | 10:09 | — | — | — | — | — | — | — | 10:09 |
mm | 1 | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | 5 | 3 | — | 2 | 10 | 4 | — |
Temp °C | 13 | 14 | 13 | 14 | 17 | 17 | 17 | 15 | 13 | 12 | 12 | 13 | 15 | 18 | 16 | 14 | 14 | 14 | 16 | 17 | 16 | 13 | 12 | 12 |
Feels °C | 11 | 12 | 11 | 10 | 14 | 14 | 14 | 12 | 10 | 9 | 10 | 10 | 13 | 16 | 16 | 13 | 13 | 13 | 12 | 14 | 14 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | ESE 4 | WNW 9 | NW 4 | NW 4 | NW 8 |
| kJ | 14 | 13 | 25 | 23 | 22 | 20 | 32 | 33 | 33 | 33 | 32 | 33 | 39 | 39 | 38 | 35 | 33 | 32 | 30 | 5 | 15 | 7 | 4 | 15 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 6 | E 4 | — | — | — | — | WNW 8 | ESE 4 | WNW 9 | WNW 8 | NNW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | 14 | 3 | 15 | 13 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 7 | E 4 | E 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSE 2 | ESE 2 | — | — | — | — | — | SE 3 | SSW 3 | NW 4 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 4 | 2 | 5 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 40 | 56 | 42 | 42 | 42 | 42 | 14 | 14 | 14 | 16 | 14 | 14 | 70 | 75 | 16 | 14 | 16 | 67 | 42 | 42 | 393 | 42 | 42 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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