Surf Forecasts:
Waiaha Rivermouth / Honls surf forecast from 30 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 8PM (local time) - 3ft (0.9m), 17s period, S swell with glassy winds.
- Most powerful swell: Friday 4 Sep, 11PM (local time) - 6ft (1.8m), 10s period, S swell with 605 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 8AM (local time) - 1.5ft (0.5m), 12s period with S 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 Sunday (Aug 30) at 8AM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.4m and 12s. 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 1.8m 10s and forecast to arrive on Friday (Sep 04) 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 0.4m 3s period and expected on Monday (Aug 31) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 30th Aug) | 1.5ft (0.5m) 12s |
| Best Surf | 8PM (Tue 1st Sep) | 3ft (0.9m) 17s |
| Most Powerful | 11PM (Fri 4th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s have a look at the local surf outlook for the next 16 days.
We’re looking at a run of small, clean, long-period SSW groundswell at Waiaha Rivermouth / Honls. It’s a pretty mellow stretch, not a lot of size, but there’s a real standout window that’s worth setting an alarm for. The water temperature is unremarkable for this time of year, nothing unusual going on there.
The first proper session to lock in is the early morning of Monday, 7th September. The swell is coming in at 3ft from the SSW with a very long period of 17 seconds, and the combined swell energy is a solid moderate 579. That’s a groundswell that’ll wrap in nicely. The wind is glassy, dead calm, so the surface will be silky smooth. This is an advanced reef break, so it’s suited to experienced surfers. The long period means the sets will be a bit lazy, with longer waits between them, but when they come, they’ll have real shape and power. The optimum swell direction is a perfect match for what’s rolling in. Crowds are possible here, so get in early.
The afternoon of the 7th holds up with a similar 3ft swell from the SSW, 17-second period, and even stronger combined energy of 624 (moderate). More glassy conditions. That’s the best on offer, plain and simple.
Before that, we have a few days of surfable but ordinary waves. Thursday afternoon, 3rd September, will see a shift to glassy conditions with 3ft S swell at 14 seconds, but the energy is low (254). Doable, but not special.
A bit of a wildcard pops up on Saturday afternoon, 5th September. There’s a jump in swell height to 5ft from the S, but the period drops to a short 10 seconds, and there’s a risk of thunderstorms. The wind is cross-offshore and clean though, and combined energy is moderate at 432. It’s a bit more walled-up and lumpy, but for the more experienced crew, it could offer some punchy, if not perfectly shaped, waves.
The rest of the forecast is dominated by small, marginal surf. The combined energy drops into the 100-200 range, and the swell is often under 2ft. There’s a long gap from the 8th of September onward with very little to recommend. Tuesday morning, 14th September, has a very long period of 21 seconds but only 1ft of swell, which is just too weak to do much. The entire second week is a write-off for quality waves.
The best bet is clear: Monday, 7th September at Waiaha Rivermouth / Honls. Glassy, long-period groundswell, and the right direction. Get it while it’s there.
- Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 28°C on Sun morning, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Fri afternoon. Warm (max 28°C on Wed morning, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 16 | S 11 | S 11 | SSW 18 | S 19 | S 19 | SSW 18 | S 18 | S 16 | S 16 | SSW 15 | S 15 | S 14 | SSW 14 | S 13 | S 13 | S 13 | S 8 | SSW 18 | SSW 18 | SSW 16 |
Wave Graph | |||||||||||||||||||||
91 | 89 | 84 | 108 | 188 | 267 | 528 | 509 | 548 | 507 | 380 | 272 | 261 | 254 | 176 | 126 | 89 | 401 | 123 | 121 | 107 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | cross-on | glassy | cross-on | on | glassy | cross-on | glassy | cross-on | cross-on | off | glassy | glassy | glassy | cross-off | cross-off | cross | cross |
High Tide | 4:59PM0.52m | 5:57AM0.55m | 5:31PM0.45m | 6:52AM0.59m | 6:05PM0.37m | 7:56AM0.61m | 6:49PM0.30m | 9:11AM0.64m | 8:01PM0.25m | 10:28AM0.67m | 10:02PM0.22m | 11:36AM0.71m | 11:43PM0.24m | ||||||||
Low Tide | 11:05AM0.15m | 11:23PM0.05m | 12:05PM0.19m | 11:51PM0.05m | 1:21PM0.23m | 00:25AM0.05m | 3:06PM0.25m | 1:09AM0.06m | 5:13PM0.23m | 2:10AM0.07m | 6:36PM0.18m | 3:30AM0.08m | 7:23PM0.13m | 4:53AM0.08m | |||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 6:39 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | 2 | — | — | — | — | — | 1 | 1 | — | 1 | — | — | — | 3 | 13 | 4 | — | — | 5 |
Temp °C | 28 | 27 | 26 | 28 | 27 | 26 | 28 | 28 | 27 | 28 | 27 | 27 | 27 | 28 | 27 | 26 | 25 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 29 | 29 | 31 | 29 | 30 | 31 | 31 | 30 | 31 | 30 | 32 | 30 | 31 | 31 | 31 | 29 | 30 | 30 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 11 | S 11 | S 11 | S 19 | S 19 | SSW 18 | S 18 | S 16 | S 16 | SSW 15 | S 15 | S 14 | SSW 14 | S 13 | S 13 | S 13 | S 8 | SSW 6 | SSW 5 | S 12 |
68 | 88 | 84 | 55 | 188 | 267 | 528 | 509 | 548 | 507 | 380 | 272 | 261 | 254 | 176 | 126 | 89 | 401 | 34 | 19 | 71 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 15 | SW 15 | SSW 15 | S 10 | SSW 10 | SW 14 | SW 14 | WNW 11 | S 11 | S 11 | SSW 10 | SSW 10 | WNW 9 | WNW 5 | NW 5 | NW 6 | S 13 | S 12 | S 12 | SSW 16 |
49 | 89 | 77 | 88 | 53 | 33 | 32 | 32 | 25 | 9 | 20 | 34 | 34 | 8 | 2 | 4 | 8 | 119 | 72 | 71 | 107 | |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SSW 20 | SSW 16 | SSW 18 | SW 14 | SW 16 | WNW 12 | WNW 11 | WNW 11 | W 11 | W 10 | WNW 10 | WNW 9 | WNW 9 | W 9 | W 9 | SE 12 | NNW 6 | SSW 18 | SSW 18 | SSW 4 |
91 | 75 | 83 | 108 | 51 | 61 | 14 | 13 | 25 | 9 | 8 | 9 | 8 | 8 | 2 | 2 | 39 | 3 | 123 | 121 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | NW 2 | SW 7 | W 3 | — | — | W 8 | W 7 | — | — | — | — | — | NW 5 | — | SW 2 | — | — | SSE 5 | — |
— | — | 1 | 14 | 1 | — | — | 4 | 4 | — | — | — | — | — | 6 | — | 1 | — | — | 28 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 119 | 0 | 8 | 119 | 0 | 81 | 19 | 0 | 81 | 0 | 6 | 81 | 0 | 0 | 0 | 0 | 0 | 216 | 132 | 95 |
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.











