
Surf Forecasts:
Waimanalo surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 5PM (local time) - 5ft (1.6m), 10s period, ENE swell with cross-offshore winds.
- Most powerful swell: Saturday 5 Sep, 2AM (local time) - 7.5ft (2.3m), 14s period, ENE swell with 2,041 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 5PM (local time) - 5ft (1.6m), 10s period with ENE swell.
Best Forecast Surf Conditions for Waimanalo this week:
The surf forecast for Waimanalo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 5PM. The primary swell is predicted to be 1.6m and 10s period with a secondary swell of 0.7m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Waimanalo in the next 16 days are 2.3m 14s and forecast to arrive on Saturday (Sep 05) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 9s period and expected on Tuesday (Sep 08) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 8th Sep) | 5ft (1.6m) 10s |
| Best Surf | 5PM (Tue 8th Sep) | 5ft (1.6m) 10s |
| Most Powerful | 2AM (Sat 5th Sep) | 7.5ft (2.3m) 14s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright, let me tell ya how it is for Waimanalo. I've been watching the charts and, to be honest, it's a rough start. We're looking at a solid week or so of pretty ordinary conditions before we might see a tiny window of something rideable. Here's the word.
Right now, for the next several days, it's a write-off. There's a strong onshore wind from the ENE that's just ruining everything. We’re talking wind speeds of 18 to 25 mph, which is a stiff breeze, and it's blowing straight onto the shore. The swell is showing up with some size, around 7 ft to 7 ft from the ENE, but it's a short-period, wind-affected mess. The wave energy is reading between 762 and 1705, so there's plenty of push, but the quality is just not there. It's lumpy, choppy, and cross-onshore all the way through to the end of the first week. This isn't a paddle-surf situation—with that wind and the beach break setup, it's looking more like a kite-surfing kind of day. The water temperature is a warm 27°, which is bang on average for this time of year, but you won't be enjoying it in these conditions.
We then hit a bit of a lull from Wednesday the 9th right through to Sunday the 13th. The swell drops off, but the wind stays onshore. It's just flat and messy, with wave energy dropping down to between 362 and 851. Not much to see here.
Then things get a little interesting around Tuesday the 8th. The wind is forecast to swing to the S and SSE, lightening up to 9-12 mph, giving us a cross-offshore breeze. For the first time, the forecast is calling for "good surf conditions" and "clean" conditions on Tuesday. We’ve got an ENE groundswell at 5 ft-6 ft with a 10-11 second period. The energy is moderate at 732-949. This is your window. It’s not a massive standout, but it’s the best we’ve got. For a beginner-friendly break like Waimanalo, a clean 5 ft wave with an offshore wind is a solid score. Keep in mind it can get pretty crowded here sometimes, so expect company if you head out Tuesday afternoon.
After that tiny window, it's back to the bad news. From Wednesday the 9th onward, the onshore ENE breeze just parks itself over the coast again. The swell stays between 2 ft and 8 ft for the next week, but it's all wind-slop. The period drops to 7-9 seconds, which is just short-period, junky stuff. The wave energy is moderate at best, from 352 to 1020, but the wind is always onshore, giving us "poor surf conditions". Honestly, from the 9th to the 19th, there's just no real standouts to recommend for a paddle. The forecast for the second week is just more of the same: onshore wind, average to poor surf. It looks like a long, flat, frustrating run for anyone chasing clean waves.
So to wrap it up: ignore the first week entirely. Clear your schedule for Tuesday the 8th if you can. That cross-offshore wind and a clean long-period swell is your one real chance. After that, it's back to the drawing board. The forecast can change, but for now, that's the story.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Sun afternoon. Warm (max 26°C on Fri morning, min 25°C on Fri afternoon). Mainly strong winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Mon morning. Warm (max 28°C on Tue afternoon, min 25°C on Wed night). Winds increasing (light winds from the SE on Tue night, fresh winds from the ENE by Wed night). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | E 14 | E 14 | ENE 14 | ENE 14 | E 13 | ENE 13 | E 12 | E 12 | E 12 | E 13 | ENE 13 | ENE 12 | ENE 11 | ENE 10 | NE 9 | E 14 | ENE 8 | ENE 7 | ENE 7 | E 14 | ENE 8 |
Wave Graph | |||||||||||||||||||||
404 | 577 | 2041 | 1665 | 792 | 1592 | 1334 | 566 | 1785 | 653 | 888 | 1158 | 853 | 551 | 237 | 236 | 171 | 277 | 236 | 236 | 336 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-on | on | on | cross-on | on | on | cross-on |
High Tide | 10:54AM0.59m | 11:56AM0.64m | 12:39PM0.68m | 11:21PM0.29m | 1:14PM0.70m | 00:23AM0.35m | 1:44PM0.70m | 1:12AM0.41m | 2:10PM0.68m | 1:57AM0.46m | 2:33PM0.65m | 2:42AM0.50m | |||||||||
Low Tide | 2:48AM0.04m | 4:19AM0.02m | 8:00PM0.22m | 5:27AM-0.01m | 7:55PM0.20m | 6:20AM-0.02m | 8:07PM0.17m | 7:05AM-0.01m | 8:24PM0.14m | 7:47AM0.03m | 8:43PM0.10m | ||||||||||
6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | |
mm | — | — | — | — | — | — | — | 7 | 11 | 2 | 2 | 1 | — | 1 | 2 | — | — | 2 | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 25 | 26 | 27 | 27 | 27 | 27 | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 22 | 22 | 22 | 24 | 24 | 25 | 24 | 24 | 25 | 27 | 27 | 27 | 28 | 30 | 31 | 27 | 26 | 26 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 14 | S 11 | S 12 | E 13 | SSW 12 | SSW 13 | E 12 | SSW 14 | E 13 | ENE 13 | ENE 12 | ENE 11 | ENE 10 | NE 9 | E 14 | E 13 | E 13 | E 12 | E 14 | E 13 |
357 | 577 | 89 | 177 | 792 | 152 | 183 | 566 | 264 | 653 | 888 | 1158 | 853 | 551 | 237 | 236 | 171 | 163 | 151 | 236 | 215 | |
Swell 2 Height (m) Direction Period (s) | S 12 | S 13 | SSW 13 | NNE 10 | S 12 | N 8 | N 8 | SSW 14 | SSW 18 | SW 15 | SW 14 | S 15 | S 9 | E 14 | E 14 | NW 9 | NW 8 | NW 10 | NW 9 | NW 9 | NW 8 |
199 | 206 | 60 | 20 | 184 | 12 | 11 | 175 | 66 | 441 | 466 | 115 | 95 | 181 | 200 | 51 | 10 | 59 | 41 | 27 | 11 | |
Swell 3 Height (m) Direction Period (s) | N 9 | N 12 | NNE 11 | NNE 10 | NNE 10 | SSE 10 | SSE 10 | E 16 | SSE 10 | S 9 | S 16 | WSW 11 | E 14 | S 8 | NW 9 | SSW 14 | NW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 16 |
1 | 3 | 24 | 20 | 19 | 9 | 10 | 119 | 19 | 40 | 139 | 24 | 96 | 47 | 41 | 66 | 26 | 34 | 33 | 32 | 26 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 14 | ENE 14 | ENE 6 | ENE 13 | E 12 | ENE 6 | E 12 | E 7 | E 7 | S 10 | — | — | — | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
404 | 369 | 2041 | 1665 | 220 | 1592 | 1334 | 207 | 1785 | 508 | 411 | 327 | — | — | — | 217 | 155 | 277 | 236 | 229 | 336 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 50 | 44 | 44 | 44 | 44 | 45 | 17 | 18 | 48 | 113 | 50 | 5 | 0 | 9 | 15 | 17 | 44 | 44 | 46 | 44 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Waimanalo Surf forecast
The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.
Waimanalo is 7 km (4 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.










