Surf Forecasts:
Hanalei Bay surf forecast from 29 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 5AM (local time) - 6ft (1.9m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 5AM (local time) - 6.5ft (2.0m), 8s period, ENE swell with 527 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 5AM (local time) - 6ft (1.9m), 8s period with ENE swell.
Best Forecast Surf Conditions for Hanalei Bay this week:
The surf forecast for Hanalei Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 01) at 5AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 1.6m and 8s. Another secondary swell of 0.4m and 10s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Hanalei Bay in the next 16 days are 2.0m 8s and forecast to arrive on Wednesday (Sep 02) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 16s period and expected on Sunday (Aug 30) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 1st Sep) | 6ft (1.9m) 8s |
| Best Surf | 5AM (Tue 1st Sep) | 6ft (1.9m) 8s |
| Most Powerful | 5AM (Wed 2nd Sep) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Hanalei Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about Hanalei Bay. The next couple of weeks are a real mixed bag – plenty of size, but you gotta pick your windows.
We start off slow. From now through about the 4th of September, it's pretty ho-hum. Steady east wind at around 12 mph, keeping the surf side-offshore but not glassy. Swell hangs between 4 and 5 ft with a weak, short period of 6 to 8 seconds. The energy is low, just a blip. It’s surfable, but nothing to get stoked about.
Friday the 4th of September is your first decent morning. The wind eases, and the 4 ft swell from the east-northeast looks clean. It's the best of a slow start.
Now, the real story starts around Sunday the 6th. We get a jump in swell, pushing 6 ft+ from the east-northeast, and the energy numbers go through the roof. By Tuesday the 8th, it’s a solid 8 ft. This is serious size.
The standout is Wednesday the 9th of September. You’re looking at a full 8 ft of swell from the east-northeast with a 10-second period – that’s real power. The energy readings are huge, in the thousands. This is expert territory. The wind is side-shore, so it might not be perfect glass, but for the size and power, it’s the pick of the lot. If you’re not comfortable in big, powerful surf, sit this one out.
The swell stays big through the end of the second week, but the wind gets messy. By the 11th and 12th, we’ve got potential thunderstorms and the wind is shifting all over the place, making things choppy. The last day or two drop back down to around 4 ft with light winds.
The call: The 9th of September is your main event for size and power. The mornings of the 4th and 5th are your best bet for cleaner, more manageable waves.
Water is a balmy 81°F, right on average for the season.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Sun night. Warm (max 27°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 29mm), heaviest during Wed afternoon. Warm (max 27°C on Thu afternoon, min 23°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 153 | 157 | 305 | 314 | 273 | 236 | 344 | 302 | 319 | 382 | 335 | 515 | 392 | 327 | 337 | 199 | 210 | 210 | 196 | 214 | 215 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 3:30PM0.59m | 4:07AM0.51m | 3:52PM0.53m | 4:56AM0.55m | 4:13PM0.46m | 5:53AM0.58m | 4:29PM0.39m | 7:01AM0.60m | 4:20PM0.33m | 8:23AM0.62m | 9:48AM0.66m | ||||||||||
Low Tide | 8:38AM0.09m | 9:25PM0.07m | 9:24AM0.14m | 9:49PM0.05m | 10:19AM0.19m | 10:15PM0.05m | 11:32AM0.24m | 10:47PM0.04m | 1:57PM0.27m | 11:28PM0.05m | 00:29AM0.05m | 2:01AM0.06m | |||||||||
 | |  |  |  | | | | | | | | | | | | | | | | | |
 | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | 4 | 1 | — | 4 | 2 | 2 | 1 | 1 | 1 | 3 | 3 | 5 | 12 | 3 | — | 1 | — | — | 2 |
Temp °C | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 25 |
Feels °C | 26 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 26 | 25 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 26 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 13 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 13 | ENE 8 | E 13 | ENE 8 | ENE 8 | E 12 | E 13 | E 7 |
| kJ | 89 | 125 | 73 | 72 | 39 | 37 | 18 | 18 | 319 | 382 | 335 | 383 | 392 | 31 | 256 | 85 | 210 | 210 | 150 | 167 | 183 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 12 | W 12 | W 11 | SSW 15 | SSW 15 | SSW 15 | W 12 | E 9 | W 12 | W 11 | W 11 | E 13 | W 10 | E 14 | S 15 | E 13 | E 12 | NNE 7 | W 12 | NNE 7 |
| kJ | 9 | 11 | 11 | 9 | 23 | 22 | 21 | 12 | 6 | 25 | 10 | 9 | 14 | 8 | 36 | 17 | 123 | 145 | 10 | 11 | 68 |
Swell 3 Height (m) Direction Period (s) | NW 8 | NW 8 | SSW 17 | SSW 16 | W 11 | W 13 | W 12 | SSW 14 | W 13 | SSW 14 | SSW 14 | S 17 | W 10 | S 16 | E 12 | SE 9 | S 14 | SSE 10 | SSE 9 | SSE 10 | E 13 |
| kJ | 3 | 2 | 27 | 25 | 9 | 13 | 11 | 20 | 13 | 20 | 20 | 22 | 8 | 20 | 11 | 3 | 16 | 9 | 9 | 9 | 215 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | — | — | — | ENE 8 | — | ENE 8 | ENE 7 | ENE 7 | — | — | ENE 8 | ENE 7 | — |
| kJ | 153 | 157 | 305 | 314 | 273 | 236 | 344 | 302 | — | — | — | 515 | — | 327 | 337 | 199 | — | — | 196 | 214 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 36 | 34 | 34 | 0 | 34 | 34 | 34 | 36 | 34 | 0 | 0 | 34 | 29 |
Best forecast wave conditions in Kaua'i | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Hanalei Bay Surf forecast
The above surf forecast table for Hanalei Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Hanalei Bay can be found by selecting the local surf guide option on the grey menu. Our Hanalei 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 (Hanalei 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 Hanalei 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.
Are you planning a vacation in Kaua'i? If you are looking for accommodation near Hanalei Bay, camping, hotels and condos and appartments in Kaua'i, consider staying in Lihue - Kauai which is 31 km (19 miles) away. Alternatively, find information about places to stay and car hire in Nawiliwili which is 31 km (19 miles) away
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