
Surf Forecasts:
Kiholo Bay surf forecast from 10 Aug 2026:
- Most powerful swell: Monday 17 Aug, 2AM (local time) - 4.5ft (1.3m), 5s period, SSW swell with 73 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 1.3m 5s and forecast to arrive on Monday (Aug 17) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 13s period and expected on Sunday (Aug 16) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 17th Aug) | 4.5ft (1.3m) 5s |
Table - best surf conditions forecast for Kiholo Bay over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Gotta be straight with you – the next couple of weeks are looking pretty grim for any real surf. We've got a long stretch of tiny, weak waves and a whole lot of nothing. Let's just get into it.
The entire 16-day window is a bust for any quality waves. We're looking at a solid stretch of flatness and close-outs from the get-go. The first real pulse of energy doesn't even show up until Monday the 17th, and even then, it's a messy, short-period swell that’s more about bump and chop than ridable waves. The energy jumps to a moderate 198 in that southwest swell, but with a period of just 6 seconds, it's all mush and no push. It’s the kind of day that looks more interesting for the kite surfers than for us paddle surfers.
Before that, we’ve got days of nothing. The swell stays tiny, mostly around 1ft, with the odd glassy window, like Wednesday afternoon the 12th and Sunday the 16th, but there’s just not enough water moving to make it worth paddling out. The energy readings are super low, often in the low 20s, and it's just a waiting game.
The only real, and I mean *only*, glimmer of hope comes much later, on Thursday the 20th of August. There's a long-period groundswell from the southwest, with a period of 18 seconds. This is the kind of swell that has real energy behind it, even if the height is only showing 1ft. The energy reading is a moderate 77, and it’s coming from the west-southwest. This is a promising sign for Kiholo Bay (Big Island), which is a beach and point setup that loves a west-northwest swell. The direction is close enough to its optimum that it could wrap in nicely. The morning looks clean, with a light west-northwest wind, but it's a cross-on breeze, so it won't be glassy. Still, this is the standout, the one to watch. But it's nine days out, so treat it as a promising possibility, not a certainty.
Honestly, the water temp is about average for this time of year, so no surprises there. The main story is the lack of any real swell for the next week and a half. The surf is just poor, and the conditions are poor. Keep the board in the car, but don't hold your breath. This is a long stretch of flatness, and the only thing that looks remotely interesting is that long-period pulse on the 20th. It’s a long shot, but it’s the only shot we’ve got.
Stay tuned, and check back closer to the 20th. Forecasts can change.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Warm (max 29°C on Mon morning, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Thu afternoon, min 25°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NNE by Sat afternoon). | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 | W 11 | W 11 | W 10 | SSW 14 | W 10 | W 11 | W 11 | WNW 13 | SSW 16 | WNW 12 | W 12 | W 12 | SSW 14 | W 12 | W 12 | WNW 11 | W 11 | WNW 13 |
Wave Graph | |||||||||||||||||||
23 | 21 | 21 | 18 | 0 | 8 | 23 | 22 | 33 | 0 | 28 | 25 | 25 | 0 | 25 | 11 | 24 | 22 | 34 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | on | glassy | glassy | cross-on | glassy | cross | cross | cross | cross-off | cross-on | glassy | cross-off | cross | cross | cross |
High Tide | 1:45AM0.32m | 2:38PM0.90m | 2:37AM0.36m | 3:19PM0.90m | 3:24AM0.42m | 3:56PM0.88m | 4:09AM0.48m | 4:30PM0.83m | 4:54AM0.53m | 5:01PM0.75m | 5:39AM0.57m | 5:30PM0.66m | |||||||
Low Tide | 9:17PM0.15m | 7:11AM0.03m | 9:46PM0.12m | 8:06AM0.02m | 10:15PM0.10m | 8:56AM0.02m | 10:44PM0.08m | 9:44AM0.06m | 11:11PM0.08m | 10:32AM0.11m | 11:36PM0.08m | 11:20AM0.18m | 00:02AM0.08m | ||||||
— | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
6:55 | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | |
mm | 2 | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 29 | 29 | 27 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 29 | 27 |
Feels °C | 32 | 32 | 33 | 31 | 30 | 31 | 30 | 30 | 30 | 30 | 29 | 29 | 27 | 29 | 30 | 28 | 30 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 5 | NE 6 | NE 6 | NE 5 | NE 5 | NE 6 | SSW 13 | NNE 5 | NE 6 | NE 5 | SSW 16 | NNE 6 | SSW 14 | NNE 6 | NNE 6 | SSW 14 | WNW 11 | SSW 13 | E 12 |
28 | 31 | 40 | 30 | 12 | 37 | 35 | 15 | 46 | 23 | 48 | 55 | 70 | 51 | 61 | 36 | 24 | 34 | 104 | |
Swell 2 Height (m) Direction Period (s) | W 12 | W 11 | SSW 15 | W 10 | NE 6 | SSW 14 | W 11 | SSW 13 | SSW 13 | SSW 13 | WNW 12 | SSW 15 | W 12 | NE 8 | SSW 14 | W 12 | SSW 13 | W 11 | WNW 13 |
23 | 21 | 47 | 18 | 14 | 40 | 23 | 32 | 32 | 32 | 28 | 44 | 25 | 16 | 40 | 11 | 35 | 22 | 34 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | NE 8 | W 11 | SSW 15 | SSW 14 | W 10 | W 14 | W 11 | WNW 13 | SSW 16 | SSW 12 | W 12 | S 18 | SSW 14 | W 12 | W 15 | W 15 | E 11 | SSW 13 |
14 | 10 | 21 | 23 | 41 | 8 | 15 | 22 | 33 | 51 | 28 | 25 | 6 | 69 | 25 | 4 | 4 | 23 | 17 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 5 | — | — | — | NE 6 | — | NNE 6 | — | — | NE 8 | NE 8 | NNE 9 | NNE 8 |
— | — | — | — | — | — | 15 | — | — | — | 44 | — | 53 | — | — | 176 | 158 | 247 | 326 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 27 | 99 | 27 | 22 | 94 | 43 | 22 | 99 | 99 | 27 | 22 | 22 | 26 | 22 | 14 | 14 | 97 | 97 | 27 |
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.











