Surf Forecasts:
Kiholo Bay surf forecast from 4 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 8AM (local time) - 1ft (0.3m), 13s period, W swell with 29 kJ wave energy.
Best Forecast Surf Conditions for Kiholo Bay this week:
The most powerful waves expected at Kiholo Bay in the next 16 days are 0.3m 13s and forecast to arrive on Sunday (Aug 09) at 8AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Saturday (Aug 08) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sun 9th Aug) | 1ft (0.3m) 13s |
Table - best surf conditions forecast for Kiholo Bay over the next 16 days.
The Lowdown
Alright, Rusty here, giving you the rundown on Kiholo Bay. We’re in for a tough stretch, no two ways about it. The next week and a half is mostly a washout, with tiny, weak waves. The water is 81°, which is a touch warmer than average for this time of year.
From the 3rd of August through the 13th, it’s flat. Ankle-high dribble, with combined swell energy barely cracking triple digits. The winds are mostly onshore or cross-onshore, with a few glassy moments, but nothing to get excited about. Leave the board at home.
Now, the 14th of August, a Friday, is when we start to see a pulse. The swell hits 3 feet out of the west, with a period of 16-17 seconds – that’s real groundswell energy. The combined energy jumps to (351), which is a moderate amount of power. It’s still a marginal call, with light cross-onshore wind, but the size is there. That swell holds through the 15th, with similar 3 feet west swell. The 16th drops off a little.
The standout is the 17th of August. Monday morning, the swell is 2 feet from the west, with a 14-second period and combined energy of (136). The wind is glassy. Absolutely flat calm. The afternoon is even better, with zero wind and glassy conditions. It’s not big, but for Kiholo Bay, a clean, waist-high wave with that glassy surface is the best we’ll see. The optimum swell direction is from the WNW, and we’re getting west and WNW, so that’s a good match. The break is a beach and point, which is consistent, so it’ll be working. Expect crowds, though – it’s a popular spot when it’s clean.
The 17th is your only real chance. Everything after that gets messy again. It’s a week and a half away, so the forecast is promising but not set in stone. Keep your fingers crossed.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 28°C on Fri morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | W 12 | ENE 11 | W 11 | W 13 | W 13 | W 12 | W 12 | W 12 | W 12 | SSW 14 | W 12 | W 12 | SSW 19 | SSW 18 | NE 6 | W 13 | W 12 | W 12 | W 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 11 | 0 | 10 | 12 | 28 | 11 | 11 | 11 | 12 | 0 | 11 | 11 | 0 | 0 | 0 | 13 | 28 | 25 | 22 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | cross-on | on | cross-on | glassy | on | glassy | cross-off | on | cross-on | glassy | on | cross | glassy | on | glassy | glassy |
High Tide | 8:13AM0.58m | 6:53PM0.49m | 9:29AM0.62m | 7:23PM0.40m | 10:51AM0.68m | 8:14PM0.32m | 12:04PM0.74m | 10:56PM0.27m | 1:03PM0.81m | 00:39AM0.28m | 1:54PM0.86m | 1:45AM0.32m | |||||||
Low Tide | 1:13AM0.10m | 2:00PM0.35m | 1:49AM0.10m | 4:11PM0.37m | 2:36AM0.10m | 7:20PM0.32m | 3:40AM0.09m | 8:14PM0.25m | 8:46PM0.20m | 6:08AM0.05m | 9:17PM0.15m | ||||||||
 |  | |  | | | | | | | | | | | | | |  |  | |
 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:00 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:55 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 |
Temp °C | 26 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 30 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 30 | 30 | 30 | 31 | 31 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | NNE 6 | ENE 11 | NNE 6 | NNE 5 | NNE 5 | NNE 4 | NE 5 | NE 5 | NE 5 | NNE 4 | NE 4 | NE 6 | NE 8 | NE 6 | NE 10 | NE 6 | NE 7 | NE 7 | NE 8 |
| kJ | 20 | 47 | 20 | 11 | 10 | 11 | 11 | 22 | 28 | 13 | 10 | 39 | 10 | 32 | 14 | 54 | 79 | 86 | 82 |
Swell 2 Height (m) Direction Period (s) | ENE 11 | NNE 6 | ENE 11 | ENE 10 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 7 | NE 10 | W 12 | SSW 13 | NE 10 | SSW 18 | SSW 18 | W 12 | W 12 | W 11 |
| kJ | 48 | 11 | 46 | 39 | 22 | 20 | 18 | 10 | 9 | 9 | 14 | 11 | 17 | 15 | 31 | 30 | 28 | 25 | 22 |
Swell 3 Height (m) Direction Period (s) | W 12 | NE 7 | W 11 | W 13 | W 13 | W 12 | W 12 | W 12 | W 12 | SSW 14 | W 12 | SSW 13 | SSW 19 | SSW 18 | SSW 13 | W 13 | SSW 16 | SSW 12 | SSW 12 |
| kJ | 11 | 7 | 10 | 12 | 28 | 11 | 11 | 11 | 12 | 20 | 11 | 18 | 37 | 32 | 17 | 13 | 26 | 15 | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | NE 5 | — | NE 6 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 23 | — | 49 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 94 | 26 | 94 | 22 | 22 | 94 | 94 | 26 | 94 | 43 | 22 | 94 | 94 | 22 | 99 | 22 | 22 | 90 | 22 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Kiholo Bay Surf forecast
The above surf forecast table for Kiholo Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kiholo Bay can be found by selecting the local surf guide option on the grey menu. Our Kiholo 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 (Kiholo 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 Kiholo 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.
Kiholo Bay is 89 km (55 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.
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