Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
16.1° C
1.5° 

Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Castlerock today (19 Aug):

  • Morning surf: Morning surf (19 Aug, local time) - 3ft (0.9m), 10s period with WNW swell.
  • Afternoon surf: Afternoon surf (19 Aug, local time) - 3ft (0.9m), 10s period with WNW swell.
  • Evening surf: Evening surf (19 Aug, local time) - 2.5ft (0.8m), 10s period with WNW swell.

The current surf forecast for Castlerock at 6PM is: 0.8m 10s primary swell from a West-northwest direction (forecast issued at 12:00pm August 19). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (19 Aug)3ft (0.9m)10s
Afternoon (19 Aug)3ft (0.9m)10s
Evening (19 Aug)2.5ft (0.8m)10s

Table - waves today at Castlerock. (Swell directed towards the surf break)


Short Range Forecast

Moderate rain (total 10mm), heaviest on Wed morning. Very mild (max 16°C on Wed afternoon, min 12°C on Thu night). Winds increasing (light winds from the N on Wed night, fresh winds from the NNW by Thu afternoon).

Wed
19
Thursday
20
Friday
21
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
Rating
(10 max)
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
WNW
10
0.9
WNW
10
0.9
WNW
10
0.8
WNW
10
0.8
WNW
10
0.7
WNW
10
0.7
WNW
10
1
NNW
8
1.4
NNW
8
1.7
NNW
7
1.7
NNW
7
1.6
NNW
7
1.6
NNW
7
1.7
NNW
7
1.7
NNW
7
1.6
N
7
1.4
NNW
6
1.2
NNW
6
1.2
NNW
6
1
NNW
6
0.9
NNW
5
Wave Graph
Metric surfscale
Energy kJ
171
168
151
122
122
85
85
140
226
294
277
239
206
247
268
226
155
108
97
74
51
Wind (km/h)
20
SSW
15
WSW
15
WNW
10
NW
5
N
10
N
20
NNE
20
N
20
N
30
N
30
NNW
30
NNW
30
NNW
30
N
30
N
30
N
25
N
25
N
25
NNW
25
NNW
20
NNW
Wind State
off
cross-off
cross
cross-on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
cross-on
cross-on
High Tide
10:38AM1.33m
11:03PM1.28m
11:24AM1.21m
11:54PM1.10m
1:03PM1.11m
Low Tide
5:08PM0.52m
5:35AM0.63m
6:11PM0.68m
6:42AM0.72m
8:03PM0.77m
light rain
thunderstorm
rain showers
rain showers
rain showers
part cloud
cloud
light rain
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
cloud
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:52
8:50
8:47
 mm
2
1
2
2
1
2
Temp °C
13
15
16
15
14
13
13
13
13
14
13
13
12
12
12
12
13
13
13
13
13
Feels °C
10
13
14
14
13
11
10
10
9
8
6
7
6
6
6
6
7
7
7
8
8
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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