Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 6 am 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
16.2° C
1.6° 

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 (16 Aug):

  • Morning surf: Morning surf (16 Aug, local time) - 2.5ft (0.7m), 8s period with NW swell.
  • Afternoon surf: Afternoon surf (16 Aug, local time) - 2ft (0.6m), 8s period with NW swell.
  • Evening surf: Evening surf (16 Aug, local time) - 1.5ft (0.4m), 7s period with NW swell.

The current surf forecast for Castlerock at 1PM is: 0.6m 8s primary swell from a Northwest direction (forecast issued at 06:00am August 16). The wind direction is predicted to be offshore.

Time (BST) & DateWave HeightWave Period
Morning (16 Aug)2.5ft (0.7m)8s
Afternoon (16 Aug)2ft (0.6m)8s
Evening (16 Aug)1.5ft (0.4m)7s

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


Short Range Forecast

Moderate rain (total 13mm), heaviest on Mon afternoon. Very mild (max 17°C on Tue morning, min 12°C on Sun morning). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
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
Rating
(10 max)
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
NW
8
0.7
NW
8
0.7
NW
8
0.6
NW
8
0.6
NW
7
0.5
NW
7
0.4
NW
7
0.3
WNW
10
0.3
WNW
10
0.3
WNW
9
0.3
NW
7
0.3
NW
7
0.3
NW
6
0.2
WNW
6
0.2
WNW
6
0.5
W
8
0.4
WNW
7
0.4
WNW
6
0.7
WNW
8
0.7
NW
8
0.9
WNW
9
1
WNW
10
1.2
WNW
10
Wave Graph
Metric surfscale
Energy kJ
64
63
58
35
34
27
19
18
18
17
8
7
6
4
3
29
21
12
56
74
133
204
288
Wind (km/h)
10
SW
10
S
10
SSE
10
S
15
SSE
10
SSE
10
SSE
5
S
5
S
5
SSW
10
SSW
10
SSW
15
S
15
SSE
15
SW
25
W
25
W
20
W
20
W
25
W
25
WSW
25
W
20
WSW
Wind State
cross-off
off
off
off
off
off
off
off
glassy
cross-off
cross-off
off
off
off
cross-off
cross
cross
cross
cross
cross
cross-off
cross
cross-off
High Tide
8:54AM1.59m
9:23PM1.87m
9:28AM1.53m
9:56PM1.68m
10:01AM1.44m
Low Tide
3:21AM0.17m
3:09PM0.05m
3:52AM0.28m
3:45PM0.18m
4:23AM0.40m
4:23PM0.35m
light rain
light rain
light rain
cloud
cloud
light rain
light rain
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:03
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:59
8:57
8:54
 mm
1
2
1
1
1
1
2
6
1
Temp °C
12
12
12
13
13
13
13
14
14
15
16
15
15
14
16
15
14
14
15
17
16
15
13
Feels °C
11
10
10
11
11
12
12
14
14
15
16
15
14
12
14
11
10
10
11
12
12
11
9
  • 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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