Dipper › Co. Donegal

Portarthur, Derrybeg

Excellent Quality 2025 Green Coast faces NW

🌊 Dip🏄 Surf
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Surf score now
71
Decent · chest-high 1.2 m, period 11 s
Waves
1.2 m
11 s period from WNW · model cell 2 km out
Sea
15.1°
Grand. M2 buoy, Irish Sea east of Dublin, 259 km away.
Tide
1.9 m
Falling, nearly low. Low at 04:25.
Wind
25 km/h
Moderate breeze, WSW, cross, gusts 36
Daylight
07:38
Sunrise. Sunset 19:05. Air 12°C.

Best surf each day

Daylight hours
Today
18:00
Grand 89/100
chest-high 1.1 m, period 10 s, offshore wind · 1.1 m · 16 km/h
▼ 04:25 ▲ 11:05 ▼ 17:40 ▲ 23:50
Sun, 4 Oct
15:00
Decent 71/100
chest-high 1.2 m, period 10 s, cross-shore wind · 1.2 m · 32 km/h
▼ 05:40 ▲ 12:40 ▼ 19:25
Mon, 5 Oct
17:00
Decent 71/100
chest-high 1.2 m, period 11 s, cross-shore wind · 1.2 m · 32 km/h
▲ 01:35 ▼ 07:30 ▲ 14:10 ▼ 21:05
Tue, 6 Oct
16:00
Decent 77/100
chest-high 1.1 m, period 10 s, light onshore · 1.1 m · 14 km/h
▲ 03:05 ▼ 09:00 ▲ 15:30 ▼ 22:05
Wed, 7 Oct
10:00
Decent 63/100
chest-high 1.1 m, period 9 s, onshore wind · 1.1 m · 20 km/h
▲ 04:05 ▼ 09:55 ▲ 16:25 ▼ 22:50
Thu, 8 Oct
13:00
Grim 0/100
no wave data here · 8 km/h
▲ 04:55 ▼ 10:50 ▲ 17:10 ▼ 23:25
Fri, 9 Oct
13:00
Grim 0/100
no wave data here · 38 km/h
▲ 05:35 ▼ 11:20 ▲ 17:50

Week at a glance

Tap or drag to pick an hour. Everything below follows.
Sat 02:0071 · Decentchest-high 1.2 m · period 11 s
Sat 3Sun 4Mon 5Tue 6Wed 7Thu 8Fri 90003060912151821Sat 00:00 · 71 Decent · nightSat 01:00 · 71 Decent · nightSat 02:00 · 71 Decent · nightSat 03:00 · 71 Decent · nightSat 04:00 · 71 Decent · nightSat 05:00 · 71 Decent · nightSat 06:00 · 71 Decent · nightSat 07:00 · 71 Decent · nightSat 08:00 · 71 DecentSat 09:00 · 71 DecentSat 10:00 · 63 DecentSat 11:00 · 79 DecentSat 12:00 · 79 DecentSat 13:00 · 79 DecentSat 14:00 · 79 DecentSat 15:00 · 71 DecentSat 16:00 · 71 DecentSat 17:00 · 71 DecentSat 18:00 · 89 GrandSat 19:00 · 89 GrandSat 20:00 · 79 Decent · nightSat 21:00 · 79 Decent · nightSat 22:00 · 89 Grand · nightSat 23:00 · 89 Grand · nightSun 00:00 · 89 Grand · nightSun 01:00 · 84 Grand · nightSun 02:00 · 84 Grand · nightSun 03:00 · 66 Decent · nightSun 04:00 · 66 Decent · nightSun 05:00 · 66 Decent · nightSun 06:00 · 66 Decent · nightSun 07:00 · 66 Decent · nightSun 08:00 · 54 FreshSun 09:00 · 54 FreshSun 10:00 · 54 FreshSun 11:00 · 54 FreshSun 12:00 · 66 DecentSun 13:00 · 54 FreshSun 14:00 · 59 FreshSun 15:00 · 71 DecentSun 16:00 · 71 DecentSun 17:00 · 71 DecentSun 18:00 · 71 DecentSun 19:00 · 59 FreshSun 20:00 · 59 Fresh · nightSun 21:00 · 59 Fresh · nightSun 22:00 · 59 Fresh · nightSun 23:00 · 59 Fresh · nightMon 00:00 · 59 Fresh · nightMon 01:00 · 54 Fresh · nightMon 02:00 · 71 Decent · nightMon 03:00 · 59 Fresh · nightMon 04:00 · 59 Fresh · nightMon 05:00 · 59 Fresh · nightMon 06:00 · 59 Fresh · nightMon 07:00 · 54 Fresh · nightMon 08:00 · 59 FreshMon 09:00 · 59 FreshMon 10:00 · 59 FreshMon 11:00 · 59 FreshMon 12:00 · 59 FreshMon 13:00 · 59 FreshMon 14:00 · 59 FreshMon 15:00 · 59 FreshMon 16:00 · 59 FreshMon 17:00 · 71 DecentMon 18:00 · 71 DecentMon 19:00 · 71 DecentMon 22:00 · 63 Decent · nightTue 01:00 · 77 Decent · nightTue 04:00 · 72 Decent · nightTue 07:00 · 77 Decent · nightTue 10:00 · 63 DecentTue 13:00 · 63 DecentTue 16:00 · 77 DecentTue 19:00 · 77 DecentTue 22:00 · 77 Decent · nightWed 01:00 · 79 Decent · nightWed 04:00 · 63 Decent · nightWed 07:00 · 63 Decent · nightWed 10:00 · 63 DecentWed 13:00 · 63 DecentWed 16:00 · 46 FreshWed 19:00 · 63 DecentWed 22:00 · 63 Decent · nightThu 01:00 · 63 Decent · nightThu 07:00 · 0 Grim · nightThu 13:00 · 0 GrimThu 19:00 · 0 GrimFri 01:00 · 0 Grim · nightFri 07:00 · 0 Grim · nightFri 13:00 · 0 GrimFri 19:00 · 0 Grim

Sat, 3 Oct, 02:00

71 Decent
  • chest-high 1.2 m
  • period 11 s
  • cross-shore wind
  • cross wind
NESWsunrisesunset1.2 m25 km/h
faces 319° NW · wind cross
Waves
1.2 m @ 11 s from WNW
Wind
25 km/h WSW · gusts 36
Tide
2.1 m · lower half
Air
12°C · dry

Meteogram

Score, waves, wind (green offshore, amber cross, red onshore), rain and air, tide

Hour by hour

Next 48 hours
TimeSurfWavesPeriodFromWindGustTideRainAirWhy
Today
02:0071 Decent1.2 m (0.9 swell)11 sWNW25 km/h WSW362.1 m dry12°chest-high 1.2 m, period 11 s, cross-shore wind
03:0071 Decent1.2 m (0.8 swell)11 sWNW23 km/h WSW351.6 m dry12°chest-high 1.2 m, period 11 s, cross-shore wind
04:0071 Decent1.2 m (0.8 swell)11 sWNW22 km/h WSW361.3 m ▼dry12°chest-high 1.2 m, period 10 s, cross-shore wind
05:0071 Decent1.2 m (0.8 swell)10 sWNW24 km/h WSW381.3 m ▼dry12°chest-high 1.2 m, period 10 s, cross-shore wind
06:0071 Decent1.2 m (0.8 swell)10 sWNW26 km/h WSW401.5 m dry13°chest-high 1.2 m, period 10 s, cross-shore wind
07:0071 Decent1.2 m (0.8 swell)10 sWNW22 km/h WSW391.9 m 0.1 mm12°chest-high 1.2 m, period 10 s, cross-shore wind
08:0071 Decent1.1 m (0.8 swell)10 sWNW19 km/h SW382.4 m dry13°chest-high 1.2 m, period 10 s, cross-shore wind
09:0071 Decent1.1 m (0.8 swell)10 sWNW25 km/h WSW352.8 m dry13°chest-high 1.1 m, period 10 s, cross-shore wind
10:0063 Decent1.1 m (0.8 swell)10 sWNW19 km/h W353.1 m ▲dry13°chest-high 1.1 m, period 10 s, onshore wind
11:0079 Decent1.1 m (0.7 swell)10 sWNW17 km/h W353.3 m ▲dry13°chest-high 1.1 m, period 10 s, cross-shore wind
12:0079 Decent1.1 m (0.7 swell)10 sWNW16 km/h WSW353.2 m ▲dry14°chest-high 1.1 m, period 10 s, cross-shore wind
13:0079 Decent1.1 m (0.7 swell)10 sWNW18 km/h SW373.0 m dry14°chest-high 1.1 m, period 10 s, cross-shore wind
14:0079 Decent1.1 m (0.7 swell)10 sWNW18 km/h SW392.5 m dry14°chest-high 1.1 m, period 10 s, cross-shore wind
15:0071 Decent1.1 m (0.7 swell)10 sWNW19 km/h SW402.1 m dry15°chest-high 1.1 m, period 10 s, cross-shore wind
16:0071 Decent1.1 m (0.7 swell)10 sWNW18 km/h SW401.7 m dry15°chest-high 1.1 m, period 10 s, cross-shore wind
17:0071 Decent1.1 m (0.8 swell)10 sWNW18 km/h SSW391.5 m ▼dry15°chest-high 1.1 m, period 10 s, cross-shore wind
18:0089 Grand1.1 m (0.8 swell)10 sWNW16 km/h S391.4 m ▼dry14°chest-high 1.1 m, period 10 s, offshore wind
19:0089 Grand1.1 m (0.8 swell)10 sWNW17 km/h S391.6 m dry13°chest-high 1.1 m, period 10 s, offshore wind
20:0079 Decent1.2 m (0.8 swell)10 sWNW16 km/h S411.9 m dry13°chest-high 1.2 m, period 10 s, cross-shore wind
21:0079 Decent1.2 m (0.8 swell)10 sWNW17 km/h SSW452.2 m dry13°chest-high 1.2 m, period 10 s, cross-shore wind
22:0089 Grand1.2 m (0.8 swell)10 sWNW22 km/h S482.6 m dry13°chest-high 1.2 m, period 10 s, offshore wind
23:0089 Grand1.2 m (0.8 swell)10 sWNW26 km/h S512.8 m ▲dry13°chest-high 1.2 m, period 10 s, offshore wind
Sunday, 4 October
00:0089 Grand1.2 m (0.9 swell)10 sWNW28 km/h S532.9 m ▲dry13°chest-high 1.2 m, period 10 s, offshore wind
01:0084 Grand1.2 m (0.9 swell)10 sWNW26 km/h S552.9 m 0.1 mm13°chest-high 1.2 m, period 10 s, offshore wind
02:0084 Grand1.2 m (0.9 swell)10 sWNW28 km/h S552.6 m 0.1 mm12°chest-high 1.2 m, period 10 s, offshore wind
03:0066 Decent1.2 m (0.8 swell)10 sWNW31 km/h SSW572.2 m 0.1 mm13°chest-high 1.2 m, period 10 s, cross-shore wind
04:0066 Decent1.2 m (0.8 swell)10 sWNW31 km/h SSW571.8 m 0.2 mm13°chest-high 1.2 m, period 10 s, cross-shore wind
05:0066 Decent1.2 m (0.8 swell)10 sWNW30 km/h SSW571.6 m ▼0.2 mm13°chest-high 1.2 m, period 10 s, cross-shore wind
06:0066 Decent1.2 m (0.8 swell)10 sWNW28 km/h S571.5 m ▼0.2 mm14°chest-high 1.2 m, period 10 s, cross-shore wind
07:0066 Decent1.2 m (0.8 swell)10 sWNW31 km/h SSW561.6 m ▼0.2 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
08:0054 Fresh1.2 m (0.8 swell)10 sWNW33 km/h SSW551.9 m 0.2 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
09:0054 Fresh1.2 m (0.8 swell)10 sWNW35 km/h SSW552.2 m 0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
10:0054 Fresh1.2 m (0.8 swell)10 sWNW34 km/h SSW552.6 m 0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
11:0054 Fresh1.2 m (0.8 swell)10 sWNW33 km/h SSW562.9 m 0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
12:0066 Decent1.2 m (0.8 swell)10 sWNW30 km/h SSW563.1 m ▲0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
13:0054 Fresh1.2 m (0.8 swell)10 sWNW32 km/h SSW573.2 m ▲0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
14:0059 Fresh1.2 m (0.8 swell)10 sWNW35 km/h SW503.0 m dry16°chest-high 1.2 m, period 10 s, cross-shore wind
15:0071 Decent1.2 m (0.8 swell)10 sWNW32 km/h SW502.8 m 0.1 mm16°chest-high 1.2 m, period 10 s, cross-shore wind
16:0071 Decent1.2 m (0.8 swell)10 sWNW32 km/h SW472.4 m dry16°chest-high 1.2 m, period 10 s, cross-shore wind
17:0071 Decent1.2 m (0.8 swell)10 sWNW31 km/h SW492.0 m dry15°chest-high 1.2 m, period 10 s, cross-shore wind
18:0071 Decent1.2 m (0.8 swell)10 sWNW32 km/h SW481.7 m 0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
19:0059 Fresh1.2 m (0.8 swell)10 sNW33 km/h SW471.5 m ▼dry15°chest-high 1.2 m, period 10 s, cross-shore wind
20:0059 Fresh1.2 m (0.8 swell)10 sNW34 km/h SW481.5 m ▼0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
21:0059 Fresh1.2 m (0.9 swell)10 sNW35 km/h SW481.6 m 0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
22:0059 Fresh1.2 m (0.9 swell)11 sNW36 km/h SW501.9 m 0.1 mm15°chest-high 1.2 m, period 10 s, cross-shore wind
23:0059 Fresh1.2 m (0.9 swell)11 sNW38 km/h SW492.3 m 0.1 mm15°chest-high 1.2 m, period 11 s, cross-shore wind
Monday, 5 October
00:0059 Fresh1.2 m (1.0 swell)11 sNW39 km/h SW492.6 m 0.1 mm15°chest-high 1.2 m, period 11 s, cross-shore wind
01:0054 Fresh1.3 m (1.0 swell)11 sNW36 km/h WSW552.8 m ▲dry15°chest-high 1.3 m, period 11 s, cross-shore wind

Where the energy comes from

Wave energy (H²·T) this week by direction, against the swell window

Swell arriving between W and NE reaches this spot; anything else is blocked by land and counts for much less.

Tide today

Aranmore, 17 km away · metres above chart datum
04:2511:0517:4023:50
Low 04:25 · 1.3 mHigh 11:05 · 3.3 mLow 17:40 · 1.4 mHigh 23:50 · 2.9 m

The spot

Faces
319° NW
Swell window
W 280° → NE 50°
Exposure
Open coast · model cell 2 km out
Water
Excellent Quality

Facing and swell window are derived from the wave model's coastline around the spot, not surveyed. Know better? Tell us.

Water quality

Recent grades: 2024 Excellent, 2023 Excellent, 2022 Good. The EPA flags a short-term pollution risk here after heavy rain.

Beach profile (PDF) · beaches.ie

On the ground

No lifeguard listedNo toiletsParkingAccessible: YesDogs on lead

As listed by Donegal County Council. Open in Maps.

Sauna after?

Wild Atlantic Sea Sauna Dooey Beach · Dooey Beach, Lettermacaward · 25 km · fixed

Cocoon Sauna · Portnablagh Pier, Dunfanaghy · 26 km · fixed

itSaunatrailer · The Wee Beach, Marble Hill, Dunfanaghy · 28 km · fixed

Portarthur beach is a north facing, long sandy beach; confined by a rocky outcrop east of Inishmeane Island to the North and a small estuary to the south. Fixed dunes are frequent throughout the site. They support a wide variety of plant species including some rare plant forms. There are also a wide range of bird species. Portarthur is situated in a Gaeltacht area with a variety of islands off the coast. Activities at Portarthur beach include swimming, kayaking, boating, sailing, power boating, jet skiing, diving and other land based activities on the beach. The designated bathing area is approx. 0.225km2 and the extent along the water is approximately is 1070m. There is a deep gradient off Portarthur Beach with the water depth reaching 1m approx. 10m from the water line and continuing out at a deep slope.

Put Portarthur, Derrybeg in your calendar

Dipper Plus drops the best surf hour here into your phone every day, with waves, sea temperature, tide and a 45-minute nudge. Up to three spots.

Set up Dipper Plus
🏄 Portarthur, Derrybeg surf · Grand · sea 15° · 1.1 mSat, 3 Oct 17:30–18:30 · chest-high 1.1 m, period 10 s, offshore wind
🏄 Portarthur, Derrybeg surf · Decent · sea 15° · 1.2 mSun, 4 Oct 14:30–15:30 · chest-high 1.2 m, period 10 s, cross-shore wind
🏄 Portarthur, Derrybeg surf · Decent · sea 15° · 1.2 mMon, 5 Oct 16:30–17:30 · chest-high 1.2 m, period 11 s, cross-shore wind

Nearby spots

Lough Inishsirrer

2 km · Co. Donegal · Not classified

Loch Bhun an Inbhir

2 km · Co. Donegal · Not classified

Lough Bheithe

3 km · Co. Donegal · Not classified

Loch Mhachaire na nGall

4 km · Co. Donegal · Not classified

Score is Dipper's own blend. It rates comfort, not safety. Forecast: Met Éireann. Waves: Marine Institute Irish Shelf wave model.