Surf Forecasts:
Waikiki surf forecast from 17 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 11AM (local time) - 1.5ft (0.5m), 16s period, SW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 11PM (local time) - 2.5ft (0.8m), 16s period, SSW swell with 322 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 5AM (local time) - 2ft (0.6m), 12s period with S swell.
Best Forecast Surf Conditions for Waikiki this week:
The surf forecast for Waikiki over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 5AM. The primary swell is predicted to be 0.6m and 12s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Waikiki in the next 16 days are 0.8m 16s and forecast to arrive on Friday (Aug 21) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Saturday (Aug 22) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 19th Aug) | 2ft (0.6m) 12s |
| Best Surf | 11AM (Wed 19th Aug) | 1.5ft (0.5m) 16s |
| Most Powerful | 11PM (Fri 21st Aug) | 2.5ft (0.8m) 16s |
Table - best surf conditions forecast for Waikiki over the next 16 days.
The Lowdown
Alright, let’s break down what’s coming. It’s a bit of a slow start, but there’s a monster building out there that you need to know about. We’re looking at a long stretch of small, clean surf first, then a big, powerful pulse that’s only for the brave.
For the next few days, we’ve got tiny waves. That south swell is barely registering, showing around 2 to 3 feet, with a long period, but there’s just no energy in it. The combined swell energy is weak, reading between 195 and 407. Waikiki (Oahu) is the spot, and the water is 81°, which is about normal for the season. Monday morning has some clouds and a decent offshore breeze, keeping things clean, but the waves are just marginal. It’s one of those days you’d go for a swim, not a surf.
Tuesday is still small, still clean, but nothing to write home about. The swell is a bit smaller, and we're in that “poor” to “marginal” zone. Wednesday starts to shift a little with the swell coming more from the southwest and the period stretching out to 16 seconds. It’s still small, but the quality is a bit better. The energy is still weak, around 236, but the waves will have a bit more shape to them.
Thursday the 20th is where we start to see some life. The wind goes light and glassy, with that offshore flow, and the swell, while still small at 2 feet, is from the south-southwest with a very long 18-second period. It’s clean and lined up, but still on the small side. This is probably the best of the first week, but it's not exactly a standout.
We roll into the weekend with similar small waves, around 2 feet, and good conditions through Saturday morning. Then the wind picks up in the afternoon, and it gets a bit bumpy. The energy is moderate, but not impressive. It’s all just a holding pattern until the main event.
Now, here’s the big one. Starting Thursday the 27th of August, that south swell starts to build with a lot of intent. The energy jumps to 677, and the wave height pushes to just over 4 feet. But that’s just the precursor. That afternoon, everything changes. We’re talking about 11-foot plus waves from the south-east, with a short 9-second period. The energy is a massive 2711. This is not a beginner wave. This is a “know what you’re doing” wave. The wind is offshore, so it will be glassy, but make no mistake, this is heavy and powerful.
This continues through the 28th and 29th. Wave heights between 7 and 8 feet, with periods in the 11-12 second range. The energy stays massive, between 1303 and 2042. The wind is offshore and strong. The data is clear that this is too big for Waikiki, and I agree. This is expert-only territory. The conditions will be challenging, even for the most experienced surfers. It’s going to be a wild few days, but if you’re not 100% confident in your ability, stay on the sand and enjoy the show.
After that peak, it drops off just as fast. By Sunday the 30th, the swell is back down to 3 feet, but the wind is howling from the ENE at 28 mph, making a mess of things. The energy collapses. We’re back to poor conditions, and that stays the case through the end of the period. The 31st and the 1st of September are similar – small swell, but strong offshore winds that make it hard to paddle into anything. It’s a real buzzkill after the epic days before.
So here’s the deal: the next several days are clean but small. The standout for the average surfer is the end of the first week, with those glassy, small waves on Thursday, but the real highlight is the massive swell from the 27th to the 29th. That’s the one for the big wave chargers. Don’t get caught out if you're not ready for it.
Alright, that’s the picture from here. Stay safe out there.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Tue afternoon, min 24°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Thu morning, min 25°C on Thu morning). Winds increasing (light winds from the NE on Thu night, fresh winds from the ENE by Sat night). | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | SW 16 | E 8 | SW 16 | SSW 18 | SSW 17 | SW 16 | SW 17 | SW 16 | SSW 16 | SW 16 | SW 16 | SSW 16 | SW 15 | SSW 15 | SW 14 |
Wave Graph | |||||||||||||||||||||
334 | 260 | 170 | 121 | 119 | 116 | 129 | 100 | 129 | 207 | 200 | 274 | 291 | 261 | 322 | 261 | 255 | 212 | 115 | 191 | 99 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | off | cross-off | off | off | off | off | off |
High Tide | 6:52PM0.37m | 8:59AM0.51m | 7:16PM0.30m | 10:13AM0.53m | 11:25AM0.56m | 10:11PM0.21m | 12:25PM0.59m | 00:08AM0.21m | 1:12PM0.63m | 1:06AM0.23m | 1:52PM0.66m | 1:46AM0.26m | |||||||||
Low Tide | 1:59PM0.25m | 1:27AM0.08m | 3:56PM0.27m | 2:01AM0.10m | 2:47AM0.12m | 8:27PM0.20m | 8:41PM0.17m | 5:06AM0.12m | 9:00PM0.16m | 6:08AM0.10m | 9:18PM0.14m | ||||||||||
6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 25 | 25 | 25 |
Feels °C | 25 | 24 | 24 | 23 | 24 | 24 | 25 | 26 | 26 | 29 | 29 | 29 | 29 | 28 | 29 | 27 | 26 | 26 | 23 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | ENE 7 | S 13 | S 13 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | NE 7 | NE 7 | ENE 7 | SW 16 | SW 16 | SSW 16 | SW 15 | SSW 15 | SW 14 |
334 | 260 | 170 | 145 | 119 | 116 | 107 | 84 | 82 | 72 | 70 | 52 | 47 | 67 | 68 | 261 | 255 | 212 | 115 | 191 | 99 | |
Swell 2 Height (m) Direction Period (s) | S 6 | SSE 5 | E 9 | S 13 | SW 18 | SW 18 | NNE 6 | SSW 16 | NE 6 | SSW 18 | SSW 17 | SW 16 | SW 17 | SW 16 | SSW 16 | E 8 | S 12 | SSE 12 | S 13 | SSE 13 | SSE 13 |
23 | 6 | 25 | 121 | 80 | 79 | 26 | 100 | 33 | 207 | 200 | 274 | 291 | 261 | 322 | 21 | 47 | 50 | 90 | 35 | 56 | |
Swell 3 Height (m) Direction Period (s) | SW 18 | SSW 19 | SW 6 | SW 17 | W 13 | W 12 | SW 16 | S 12 | SW 16 | NNE 6 | NNE 7 | NNE 7 | E 7 | W 10 | S 13 | WNW 10 | WNW 10 | WNW 10 | SSW 15 | S 11 | SSW 15 |
50 | 37 | 6 | 74 | 31 | 25 | 129 | 45 | 129 | 27 | 29 | 26 | 23 | 18 | 54 | 32 | 34 | 20 | 76 | 22 | 71 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | — | ENE 7 | ENE 7 | — | NE 6 | — | — | — | — | — | — | — | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
283 | 231 | 172 | — | 149 | 151 | — | 31 | — | — | — | — | — | — | — | 87 | 166 | 302 | 285 | 241 | 326 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 32 | 32 | 32 | 32 | 32 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 32 | 32 | 32 | 125 | 32 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Waikiki Surf forecast
The above surf forecast table for Waikiki provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waikiki can be found by selecting the local surf guide option on the grey menu. Our Waikiki 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 (Waikiki) 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 Waikiki 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.
Waikiki is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.











