Derrynane Surf Break

Lat Long: 51.76° N 10.17° W

Derrynane 48 hour detailed Surf Forecast

Issued: 6 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Derrynane sea temperature is
17.5° C
1.3° 

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


How big are the waves at Derrynane today (21 Aug):

  • Morning surf: Morning surf (21 Aug, local time) - 1.5ft (0.5m), 9s period with W swell.
  • Afternoon surf: Afternoon surf (21 Aug, local time) - 1.5ft (0.4m), 13s period with SW swell.
  • Evening surf: Evening surf (21 Aug, local time) - 1.5ft (0.5m), 10s period with W swell.

The current surf forecast for Derrynane at 1PM is: 0.5m 9s primary swell from a West direction and 0.3m 13s secondary swell from a South-southwest direction (forecast issued at 06:00am August 21). An open ocean swell of 0.8m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (IST) & DateWave HeightWave Period
Morning (21 Aug)1.5ft (0.5m)9s
Afternoon (21 Aug)1.5ft (0.4m)13s
Evening (21 Aug)1.5ft (0.5m)10s

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


Short Range Forecast

Mostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Fri night). Winds decreasing (fresh winds from the NNW on Fri afternoon, light winds from the E by Sat night).

Friday
21
Saturday
22
Sunday
23
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)
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
1
1
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)
0.4
SW
14
0.5
W
8
0.5
W
9
0.5
W
9
0.4
SW
13
0.5
W
10
0.3
SSW
16
0.4
SSW
16
0.4
SSW
16
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
15
0.4
SSW
14
0.4
SSW
14
0.6
SSW
14
0.5
SSW
14
0.4
SSW
14
0.4
SSW
14
Wave Graph
Metric surfscale
Energy kJ
48
34
39
40
47
51
50
98
94
86
85
85
85
86
86
85
85
80
75
127
113
80
80
Wind (km/h)
15
N
15
N
25
N
25
NNW
30
NNW
25
N
20
N
20
NNE
15
NNE
15
NNE
10
NNE
10
N
20
NNW
20
N
15
NNE
15
NE
10
ENE
5
E
10
SE
15
S
10
S
10
SSE
10
ESE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-off
High Tide
11:42AM2.41m
00:29AM2.29m
1:09PM2.39m
2:00AM2.33m
2:27PM2.51m
Low Tide
6:08PM1.30m
6:45AM1.36m
7:44PM1.26m
8:11AM1.28m
8:52PM1.09m
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:35
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:52
8:50
8:47
 mm
Temp °C
13
13
15
16
16
15
14
13
12
11
13
16
17
17
15
15
15
14
15
15
16
16
15
Feels °C
9
9
10
10
10
10
10
9
9
8
10
13
13
13
12
12
13
12
13
12
14
15
14
  • 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 Derrynane 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.


Nearest locationNearest