Surf Forecasts:
Anaehoomalu Bay_A-Bay surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 8PM (local time) - 1ft (0.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 2PM (local time) - 1.5ft (0.5m), 11s period, WNW swell with 69 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 8PM (local time) - 1ft (0.3m), 16s period with SW swell.
Best Forecast Surf Conditions for Anaehoomalu Bay_A-Bay this week:
The surf forecast for Anaehoomalu Bay_A-Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 8PM. The primary swell is predicted to be 0.3m and 16s period with a secondary swell of 0.3m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Anaehoomalu Bay_A-Bay in the next 16 days are 0.5m 11s and forecast to arrive on Sunday (Aug 23) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Friday (Aug 21) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 19th Aug) | 1ft (0.3m) 16s |
| Best Surf | 8PM (Wed 19th Aug) | 1ft (0.3m) 16s |
| Most Powerful | 2PM (Sun 23rd Aug) | 1.5ft (0.5m) 11s |
Table - best surf conditions forecast for Anaehoomalu Bay_A-Bay over the next 16 days.
The Lowdown
IMPERIAL
Well folks, Rusty here. Let’s be straight with you: we’re looking at a pretty quiet stretch ahead. The only spot lighting up is Anaehoomalu Bay / A-Bay (Hawaii) , but it’s a real mixed bag with tiny waves and persistent poor conditions. The water temp is sitting at 81°F, which is about average for this time of year – nothing too weird.
Right now, Monday the 17th sees a tiny 1ft swell out of the WNW with that lovely glassy wind, but the wave comment doesn’t lie – it’s just poor. The energy is weak at 24, and there’s nothing to get excited about. Tuesday the 18th brings more of the same: 1ft WNW swell, some light wind but still poor surf. The combined energy barely moves up to 25 and then 39. It’s a tough watch.
Wednesday the 19th, we get a slightly longer 12-second period out of the WNW, and the swell bumps up to 1ft – energy climbs to 48 in the morning, then 94 in the afternoon. That’s still weak-to-moderate at best, and the afternoon brings in a cross-shore wind that messes with it. Not worth paddling out for. Thursday the 20th sees the swell drop to 1ft with a longer-period 18-second pulse from the SW – that’s a groundswell, which can be tricky for a beachy setup, and the energy is only 73. The afternoon improves to glassy with a “surfable but very ordinary” note – just a 1 out of 10. Still, if you’re desperate, maybe a dawn session.
Friday the 21st is back to tiny, poor, and weak. Saturday the 22nd offers another glassy window in the afternoon with a 1ft WNW swell at 10 seconds, but energy is only 34. It’s not enough to make a wave of any substance. Sunday the 23rd shows a slight bump in energy to 121 in the morning with a 1ft WNW swell at 12 seconds, but the wind is cross-shore and building, killing any chance of clean surf.
From Monday the 24th through the end of August, it’s a frustrating dead zone. Swell heights are mostly 0.3ft to 1ft, periods are all over the place, and the wind is inconsistent. There are pockets of glassy conditions on the 25th, 26th, and 27th, but with zero energy (some days the combined energy is literally 0), you’re not catching anything. The whole first week is a dud.
Things get a slight flicker of life around the very end of the forecast. Sunday, August 30th picks up a 1ft WNW swell with a 16-second period, and the combined energy hits 114 by the afternoon. The wind stays light cross-onshore, though, so it’s still not ideal. Monday, August 31st is probably the best we see: a 2ft WNW swell at 15 seconds, with the afternoon turning glassy and the energy reaching 126 – that’s weak but at least it’s something. The wave comment says “surfable but very ordinary,” which is as good as it gets.
If there’s one standout in this whole 16-day slog, I’d point to Monday afternoon, August 31st at A-Bay. It’s the biggest swell we get (2ft), a solid 15-second period that suggests some push, and glassy wind. The crowds can be an issue here sometimes, but on a day like this, with such marginal surf, you might have it quiet. That’s your best bet, but keep expectations low.
For the first week, honestly, you’re better off with a kite if the wind picks up, because the paddle surfing is a no-go.
Stay patient, folks. Forecasts can change.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 25°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Sat afternoon, min 25°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 13 | WNW 12 | WNW 12 | SW 16 | SW 18 | SW 17 | W 11 | W 10 | SW 16 | WNW 10 | SW 15 | WNW 10 | SW 15 | WNW 12 | WNW 11 | WNW 10 |
Wave Graph | ||||||||||||||||||||
24 | 25 | 25 | 25 | 33 | 48 | 48 | 41 | 49 | 47 | 20 | 19 | 39 | 35 | 37 | 34 | 36 | 55 | 45 | 18 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | on | glassy | glassy | on | cross | glassy | on | glassy | glassy | on | cross-on | glassy | on | glassy | glassy | cross | cross | cross-off |
High Tide | 6:17PM0.49m | 8:14AM0.60m | 6:29PM0.41m | 9:26AM0.60m | 10:50AM0.61m | 12:03PM0.64m | 11:21PM0.26m | 12:57PM0.68m | 00:46AM0.28m | 1:38PM0.72m | 1:33AM0.32m | |||||||||
Low Tide | 00:52AM0.12m | 2:39PM0.36m | 1:22AM0.14m | 2:03AM0.16m | 3:10AM0.18m | 8:46PM0.25m | 8:47PM0.22m | 5:53AM0.15m | 9:01PM0.19m | |||||||||||
— | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
6:50 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 28 | 27 |
Feels °C | 33 | 31 | 30 | 31 | 30 | 32 | 31 | 31 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 33 | 31 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NNE 5 | NNE 5 | WNW 11 | NNE 4 | WNW 12 | WNW 12 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NE 6 | NE 7 | NE 6 | NE 5 | WNW 10 | WNW 12 | NNE 6 | NE 6 |
45 | 17 | 15 | 25 | 8 | 48 | 48 | 22 | 33 | 31 | 31 | 30 | 43 | 44 | 38 | 23 | 33 | 55 | 53 | 38 | |
Swell 2 Height (m) Direction Period (s) | WNW 11 | NE 8 | WNW 11 | ENE 7 | WNW 13 | NE 7 | SW 16 | WNW 11 | SW 18 | SW 17 | SW 16 | W 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 12 | WNW 10 | WNW 11 | WNW 10 |
24 | 9 | 25 | 5 | 33 | 12 | 42 | 25 | 49 | 47 | 69 | 19 | 20 | 35 | 33 | 34 | 28 | 32 | 45 | 18 | |
Swell 3 Height (m) Direction Period (s) | S 14 | WNW 11 | NE 8 | W 13 | ENE 7 | NNE 7 | W 7 | SW 16 | WNW 11 | W 11 | W 11 | SW 16 | SW 16 | SW 16 | SW 15 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 |
16 | 25 | 9 | 14 | 5 | 9 | 4 | 41 | 24 | 21 | 20 | 69 | 39 | 64 | 37 | 63 | 36 | 34 | 21 | 20 | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 5 | — | — | NNE 6 | — | — | — | — | — | — | — | — | — | NE 5 | NNE 6 | — | — |
— | — | — | 16 | — | — | 23 | — | — | — | — | — | — | — | — | — | 25 | 49 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 91 | 38 | 96 | 21 | 21 | 91 | 8 | 5 | 16 | 0 | 13 | 16 | 87 | 13 | 13 | 13 | 0 | 16 | 30 | 21 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Anaehoomalu Bay_A-Bay Surf forecast
The above surf forecast table for Anaehoomalu Bay_A-Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Anaehoomalu Bay_A-Bay can be found by selecting the local surf guide option on the grey menu. Our Anaehoomalu Bay_A-Bay 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 (Anaehoomalu Bay_A-Bay) 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 Anaehoomalu Bay_A-Bay 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.
Anaehoomalu Bay_A-Bay is 87 km (54 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.











