Surf Forecasts:
Annascaul Rivermouth surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 7AM (local time) - 5ft (1.6m), 9s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 10AM (local time) - 5.5ft (1.7m), 10s period, WNW swell with 634 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 1AM (local time) - 3.5ft (1.1m), 9s period with W swell.
Best Forecast Surf Conditions for Annascaul Rivermouth this week:
The surf forecast for Annascaul Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 1AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.4m and 4s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Annascaul Rivermouth in the next 16 days are 1.7m 10s and forecast to arrive on Thursday (Aug 27) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 9s period and expected on Thursday (Aug 20) at 7PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 25th Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 7AM (Wed 26th Aug) | 5ft (1.6m) 9s |
| Most Powerful | 10AM (Thu 27th Aug) | 5.5ft (1.7m) 10s |
Table - best surf conditions forecast for Annascaul Rivermouth over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at what’s coming down the pipe for Annascaul Rivermouth.
To be straight with you, this forecast period is a bit of a tough one. Over the next 16 days, we’ve got a massive gap of tiny, weak swell and little to nothing worth paddling out for. The first recommendation for a real surf doesn’t pop up until Tuesday the 25th, so you’re looking at nearly a full week of flat to almost-flat conditions. From Thursday the 20th right through to Monday the 24th, the swell is barely a whisper – mostly 0.7ft to 2ft, with combined energy readings often well under 100 (21 to 81 range). It’s just not enough to push a board around, even if the winds are light and clean now and then.
The standout window finally arrives on Tuesday the 25th of August. Early morning brings a pulse of 3ft swell from the W, with a period of 9 seconds. The combined energy jumps up to 137 – moderate energy compared to the weak stuff before it. The wind will be light and cross-off from the ESE, keeping the surface clean. That’s your pick of the whole run. It’s small, sure, but it’s the best we get, and those glassy conditions will make the most of it.
Through Wednesday the 26th and Thursday the 27th, the swell builds a bit more, hitting 5ft to 6ft from the W and WNW, with combined energy climbing into the strong range (427 to 640). But here’s the rub: the wind gets messy, turning cross-on or onshore, and the wave comment flags “poor surf conditions” the whole way. The period is only 9-10 seconds, so it’s not the grunty stuff, and with that wind chop, it’s going to be a bit of a battle. This stretch looks more interesting for the kite crew than a clean paddle session.
After that, it trails off again into weak, short-period windswell through the end of August and into September, with nothing else worth chasing. The water temperature is sitting at 64°, which is a touch warmer than normal for this time of year – a comfortable 4° anomaly.
Look, the honest story here is that Annascaul Rivermouth is a sheltered spot, and it needs a specific angle to work. This run just doesn’t deliver much. Tuesday morning the 25th is your best bet if you’re desperate for a slide on a longboard or a fun board.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Very mild (max 15°C on Thu morning, min 10°C on Fri night). Winds decreasing (fresh winds from the N on Thu morning, calm by Sat night). | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Mon night. Warm (max 21°C on Mon afternoon, min 12°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 15 | SW 14 | W 9 | W 9 | W 9 | W 9 | WSW 9 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 9 | SSW 14 | SSW 14 | W 9 | W 9 | W 9 | WSW 8 | W 9 | W 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 21 | 54 | 39 | 40 | 38 | 45 | 26 | 55 | 56 | 49 | 51 | 16 | 40 | 18 | 199 | 120 | 127 | 144 | 422 | 535 | 359 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | glassy | cross-on | cross-off | cross-off | cross | off | cross-off | cross | glassy | cross-on | on | on |
High Tide | 10:37AM2.58m | 11:09PM2.42m | 11:44AM2.42m | 00:32AM2.29m | 1:11PM2.39m | 2:02AM2.33m | 2:29PM2.51m | 3:08AM2.50m | 3:24PM2.71m | 3:54AM2.70m | 4:05PM2.94m | 4:32AM2.90m | 4:41PM3.16m | ||||||||
Low Tide | 4:43PM1.16m | 5:13AM1.26m | 6:10PM1.29m | 6:48AM1.35m | 7:47PM1.25m | 8:14AM1.27m | 8:54PM1.08m | 9:11AM1.09m | 9:41PM0.86m | 9:52AM0.89m | 10:19PM0.64m | 10:28AM0.70m | 10:52PM0.43m | ||||||||
 |  |  | |  | | | | | | | | | |  |  |  |  | | |  | |
 | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — |
 | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 3 | 4 | — | — | — |
Temp °C | 15 | 15 | 14 | 15 | 15 | 14 | 14 | 15 | 15 | 17 | 17 | 15 | 19 | 21 | 17 | 18 | 18 | 17 | 18 | 19 | 15 |
Feels °C | 9 | 9 | 8 | 9 | 9 | 10 | 11 | 12 | 13 | 16 | 15 | 14 | 16 | 17 | 15 | 18 | 18 | 18 | 17 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 9 | WNW 8 | WNW 7 | W 9 | W 9 | N 6 | NW 6 | NNW 5 | SW 14 | NNW 7 | NNW 7 | NW 11 | WNW 10 | W 9 | W 9 | W 9 | WSW 8 | W 9 | W 10 | W 9 |
| kJ | 923 | 456 | 173 | 86 | 38 | 45 | 26 | 9 | 16 | 49 | 19 | 18 | 439 | 360 | 199 | 120 | 127 | 144 | 422 | 535 | 359 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SW 14 | W 9 | W 9 | WNW 8 | SSW 13 | NW 6 | WSW 9 | SW 15 | NW 5 | SW 14 | NW 10 | WSW 9 | WSW 8 | NW 12 | NW 11 | NW 10 | W 11 | N 12 | N 11 | N 12 |
| kJ | 21 | 54 | 39 | 40 | 12 | 17 | 15 | 26 | 56 | 7 | 51 | 50 | 25 | 14 | 22 | 18 | 15 | 58 | 25 | 22 | 103 |
Swell 3 Height (m) Direction Period (s) | — | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 16 | WSW 9 | SW 15 | WSW 9 | WSW 8 | WSW 10 | WSW 9 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | NW 8 | S 8 | S 7 | S 7 |
| kJ | — | 54 | 32 | 17 | 17 | 25 | 26 | 55 | 15 | 14 | 18 | 16 | 40 | 18 | 17 | 17 | 17 | 11 | 5 | 10 | 17 |
Wind waves Height (m) Direction Period (s) | NNW 10 | NNW 9 | N 8 | N 7 | NNW 7 | NNW 6 | — | N 6 | NE 3 | — | — | — | — | — | SSE 4 | — | S 8 | S 4 | — | — | S 8 |
| kJ | 961 | 773 | 359 | 209 | 195 | 155 | — | 22 | 1 | — | — | — | — | — | 5 | — | 10 | 3 | — | — | 54 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 653 | 567 | 78 | 112 | 101 | 3 | 14 | 3 | 3 | 3 | 96 | 13 | 3 | 13 | 0 | 3 | 3 | 0 | 13 | 13 | 13 |
Best forecast wave conditions in Kerry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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Information about the Annascaul Rivermouth Surf forecast
The above surf forecast table for Annascaul Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Annascaul Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Annascaul Rivermouth surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Annascaul Rivermouth) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Annascaul Rivermouth may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Kerry? If you are looking for accommodation near Annascaul Rivermouth, camping, hotels and holiday cottages in Kerry, consider staying in Fenit which is 21 km (13 miles) away. Other places in and around Kerry where you can find information about places to rent, and car hire include Valentia which is 27 km (17 miles) away, Tra Li, Bantry and Foynes.
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