Surf Forecasts:
Waiaha Rivermouth / Honls surf forecast from 28 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 5PM (local time) - 2.5ft (0.7m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 28 Jul, 11PM (local time) - 2.5ft (0.8m), 14s period, SSW swell with 258 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 5PM (local time) - 2.5ft (0.7m), 14s period with SSW swell.
Best Forecast Surf Conditions for Waiaha Rivermouth / Honls this week:
The surf forecast for Waiaha Rivermouth / Honls over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 28) at 5PM. The primary swell is predicted to be 0.7m and 14s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Waiaha Rivermouth / Honls in the next 16 days are 0.8m 14s and forecast to arrive on Tuesday (Jul 28) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Jul 31) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 28th Jul) | 2.5ft (0.7m) 14s |
| Best Surf | 5PM (Tue 28th Jul) | 2.5ft (0.7m) 14s |
| Most Powerful | 11PM (Tue 28th Jul) | 2.5ft (0.8m) 14s |
Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.
The Lowdown
Alright, Rusty here, giving you the lowdown on the local surf.
We’re looking at Waiaha Rivermouth / Honls. It’s a reef break that’s fairly consistent and picks up a south-southwest swell. The water is about 81°, which is normal for this time of year, so no big deal there.
The first week and a half is pretty flat. From Tuesday the 28th all the way through the 8th of August, the swell is tiny, mostly under 3 feet, and the wind is often cross or onshore, making it look messy. You’ll get a few glassy moments, like Tuesday afternoon (28th) when the wind dies and the swell is 2ft from the SSW, but it’s just not enough juice. The combined energy is mostly in the low to mid hundreds, which is weak to moderate. Some afternoons, like the 4th and 6th of August, go glassy, but the swell is only 1ft to 1ft. It’s a long stretch of nothing.
The real action is a week and a half out. It fires up on the 10th of August, Monday. A solid 4ft swell from the south-southwest, with a very long period of 16 seconds, is rolling in. The combined energy is a massive 1058, which is strong. The wind is cross-onshore in the morning, but Monday afternoon it turns to a light cross-offshore from the north-northwest, cleaning it right up. This is the best on offer—excellent surf for experienced surfers. That long period gives the waves real punch and shape, and on a reef, that’s a good thing. Be aware, crowds are possible here.
The 11th of August, Tuesday, still has a solid 4ft to 4ft SSW swell, with Tuesday afternoon going glassy—very good conditions. The 12th of August, Wednesday, keeps the energy going with a 3ft swell and clean cross-offshore winds in the morning.
So, the first week and a half is a dud, but the second week has a proper pulse. The 10th of August afternoon is the standout: 4ft of long-period SSW groundswell, clean cross-offshore wind, and strong energy. That’s the one to be ready for.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed afternoon. Warm (max 28°C on Tue morning, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
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 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | S 13 | S 13 | SW 16 | SSW 15 | SSW 15 | SW 14 | SW 14 | SW 13 | SW 14 | SSW 13 | SW 13 | SSW 12 | S 12 | SSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 198 | 207 | 247 | 243 | 178 | 222 | 160 | 166 | 163 | 124 | 152 | 144 | 91 | 91 | 88 | 49 | 59 | 42 | 51 | 75 | 82 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross-on | cross | cross-on | cross | on | cross-off | cross-on | cross-on | glassy | cross-on | on | glassy | cross-on | on | glassy | on | cross-on | glassy |
High Tide | 3:36PM0.73m | 3:30AM0.27m | 4:06PM0.73m | 4:09AM0.29m | 4:35PM0.70m | 4:51AM0.32m | 5:04PM0.66m | 5:36AM0.36m | 5:34PM0.60m | 6:27AM0.40m | 6:05PM0.54m | 7:25AM0.45m | 6:38PM0.46m | ||||||||
Low Tide | 8:13AM0.01m | 10:49PM0.09m | 8:51AM0.02m | 11:14PM0.08m | 9:29AM0.04m | 11:38PM0.07m | 10:10AM0.07m | 00:02AM0.06m | 10:55AM0.11m | 00:27AM0.05m | 11:50AM0.16m | 00:55AM0.04m | 1:00PM0.22m | 1:27AM0.03m | |||||||
 | |  | |  |  | | | | | | | | | | |  |  | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — |
 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — |
mm | — | — | — | — | 1 | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 31 | 30 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | S 13 | S 13 | S 12 | SSW 15 | SSW 15 | SW 14 | SW 14 | SW 13 | SSW 11 | SSW 13 | SSW 13 | SSW 12 | S 12 | SSW 12 |
| kJ | 198 | 207 | 247 | 243 | 178 | 222 | 160 | 166 | 163 | 112 | 152 | 144 | 91 | 91 | 88 | 40 | 59 | 34 | 51 | 75 | 82 |
Swell 2 Height (m) Direction Period (s) | S 9 | E 10 | S 21 | SW 21 | S 16 | SSW 19 | SW 18 | SW 18 | SW 16 | SW 16 | S 12 | S 12 | S 11 | S 11 | S 11 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 13 | SSW 17 |
| kJ | 2 | 2 | 9 | 17 | 46 | 37 | 111 | 152 | 129 | 124 | 73 | 69 | 39 | 41 | 21 | 49 | 27 | 42 | 26 | 16 | 28 |
Swell 3 Height (m) Direction Period (s) | — | — | S 15 | NW 9 | SSW 19 | SW 9 | S 15 | SW 13 | S 8 | S 10 | S 8 | WNW 5 | — | SE 8 | S 15 | SSW 14 | NW 9 | S 11 | W 12 | W 13 | S 19 |
| kJ | — | — | 4 | 3 | 37 | 12 | 67 | 7 | 5 | 2 | 5 | 2 | — | 18 | 19 | 40 | 3 | 20 | 12 | 3 | 28 |
Wind waves Height (m) Direction Period (s) | — | — | — | WNW 9 | WNW 9 | — | NW 3 | WSW 8 | NW 3 | SW 2 | WNW 3 | — | WSW 3 | W 8 | S 4 | NW 4 | S 7 | W 8 | — | — | WSW 2 |
| kJ | — | — | — | 8 | 8 | — | 2 | 13 | 4 | 2 | 6 | — | 2 | 5 | 1 | 3 | 4 | 5 | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 117 | 0 | 3 | 100 | 100 | 6 | 96 | 96 | 0 | 119 | 6 | 0 | 100 | 19 | 0 | 119 | 3 | 0 | 100 | 100 | 0 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Waiaha Rivermouth / Honls Surf forecast
The above surf forecast table for Waiaha Rivermouth / Honls provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waiaha Rivermouth / Honls can be found by selecting the local surf guide option on the grey menu. Our Waiaha Rivermouth / Honls 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 (Waiaha Rivermouth / Honls) 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 Waiaha Rivermouth / Honls 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.
Waiaha Rivermouth / Honls is 95 km (59 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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