Surf Forecasts:
Kiholo Bay surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8PM (local time) - 1ft (0.3m), 17s period, SW swell with glassy winds.
- Most powerful swell: Saturday 22 Aug, 11PM (local time) - 2ft (0.6m), 11s period, WNW swell with 88 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 1ft (0.3m), 17s period with SW swell.
Best Forecast Surf Conditions for Kiholo Bay this week:
The surf forecast for Kiholo Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8PM. The primary swell is predicted to be 0.3m and 17s period with a secondary swell of 0.4m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kiholo Bay in the next 16 days are 0.6m 11s and forecast to arrive on Saturday (Aug 22) at 11PM. 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 22) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 20th Aug) | 1ft (0.3m) 17s |
| Best Surf | 8PM (Thu 20th Aug) | 1ft (0.3m) 17s |
| Most Powerful | 11PM (Sat 22nd Aug) | 2ft (0.6m) 11s |
Table - best surf conditions forecast for Kiholo Bay over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at ya from the Big Island. Let's talk about what's on the menu for the next couple of weeks.
Alright, truth be told, we're lookin' at a pretty flat spell for a while here. The first decent sign of life doesn't pop up until we're well into the first week of September. So, for the next week or so, you're gonna be staring at flat, glassy water with barely a ripple. It's a bummer, I know, but that's how it goes sometimes.
The first real action we see is on Thursday, September 3rd, and it's a tease. A new long-period groundswell starts to show up at Kiholo Bay, a WNW swell around 1 ft, but it's coming with a period of 21 seconds and a combined energy of 207 - that's got some deep-ocean power behind it. The wind is light offshore from the NW, so it could be clean, but the swell is just too small and the period is so long it'll be hard to get a decent wave face. Still, it's a sign of things to come.
Now, Friday, September 4th, is where it gets a little more interesting. The swell builds, with a 3 ft W swell rolling in and a period of 16 seconds. The energy jumps to 560 (moderate wave energy). The wind stays light from the WNW in the morning, keeping it clean. Honestly, this is the best of the bunch. It's not huge, but for a spot that's been flat, it's a welcome change. The water temp is a toasty 82°, which is about normal for this time of year.
The crowd situation at Kiholo Bay can be a bit of a toss-up; sometimes it's on, sometimes it's not. Keep an eye on it. It's a beach and point setup, so that long-period swell (over 15 seconds) might actually wrap around the point better than it would at a straight beach break.
So, if you're itching to get wet, your best bet is going to be Friday, September 4th at Kiholo Bay. It's a one-day wonder, and the weekend after that looks like it's back to the drawing board with more flat, glassy conditions. It's a long-range call, so don't bet the house on it, but it's the only real highlight on the horizon.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat morning, min 26°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Mon afternoon. Warm (max 29°C on Mon morning, min 25°C on Tue 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) | SW 18 | SW 17 | W 10 | W 10 | W 11 | W 10 | SW 15 | W 11 | WNW 11 | WNW 12 | WNW 11 | WNW 10 | WNW 11 | WNW 12 | WNW 11 | NNE 5 | NE 6 | NE 5 | W 11 | NE 6 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 49 | 47 | 35 | 52 | 59 | 50 | 37 | 57 | 88 | 77 | 45 | 9 | 12 | 14 | 12 | 0 | 0 | 0 | 9 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross-on | cross-on | glassy | on | glassy | glassy | cross-on | glassy | glassy | on | cross-on | glassy | on | cross-off | glassy | cross-on | glassy | cross-off |
High Tide | 10:50AM0.61m | 12:03PM0.64m | 11:21PM0.26m | 12:57PM0.68m | 00:46AM0.28m | 1:38PM0.72m | 1:33AM0.32m | 2:12PM0.75m | 2:09AM0.36m | 2:42PM0.78m | 2:44AM0.41m | 3:11PM0.79m | 3:18AM0.46m | ||||||||
Low Tide | 3:10AM0.18m | 8:46PM0.25m | 8:47PM0.22m | 5:53AM0.15m | 9:01PM0.19m | 6:48AM0.12m | 9:18PM0.17m | 7:33AM0.09m | 9:36PM0.14m | 8:14AM0.08m | 9:55PM0.12m | ||||||||||
 | |  | | | | | | | |  | | |  |  | | | | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 4 | 2 | — | 2 | — | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 26 |
Feels °C | 31 | 31 | 32 | 31 | 30 | 32 | 32 | 33 | 30 | 31 | 32 | 32 | 33 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NE 7 | NE 7 | NE 6 | NE 6 | WNW 11 | WNW 12 | NNE 6 | NE 6 | NE 6 | NE 6 | NE 6 | SSW 12 | NE 6 | NE 5 | NE 5 | NE 6 | NNE 5 |
| kJ | 33 | 42 | 31 | 26 | 52 | 44 | 46 | 64 | 88 | 77 | 65 | 33 | 31 | 40 | 39 | 30 | 46 | 28 | 28 | 38 | 17 |
Swell 2 Height (m) Direction Period (s) | W 11 | WNW 11 | W 10 | W 10 | W 11 | W 10 | WNW 10 | W 11 | SW 15 | SW 15 | WNW 11 | WNW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 16 | SSW 12 | SSW 14 | SSW 15 | SSW 17 | SSW 13 |
| kJ | 38 | 23 | 35 | 52 | 59 | 50 | 33 | 57 | 58 | 34 | 45 | 9 | 18 | 35 | 32 | 25 | 14 | 21 | 21 | 29 | 17 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 17 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | WSW 9 | ENE 8 | SSW 14 | SSW 14 | WNW 11 | WNW 12 | WNW 11 | ENE 8 | SSW 16 | SSW 12 | W 11 | SSW 14 | SSW 16 |
| kJ | 49 | 47 | 69 | 72 | 39 | 64 | 37 | 63 | 9 | 6 | 21 | 20 | 12 | 14 | 12 | 6 | 24 | 14 | 9 | 18 | 25 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NE 6 | NE 6 | — | — | — | — | — | NNE 5 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 39 | 51 | — | — | — | — | — | 36 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 23 | 21 | 21 | 21 | 21 | 21 | 21 | 14 | 0 | 23 | 14 | 14 | 90 | 31 | 22 | 99 | 22 | 27 | 22 | 94 | 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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