
Surf Forecasts:
In Betweens surf forecast from 7 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.3m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 13ft (4.0m), 13s period, SSW swell with 5,172 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.3m), 10s period with ENE swell.
Best Forecast Surf Conditions for In Betweens this week:
The surf forecast for In Betweens over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 2AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.3m and 10s. Another secondary swell of 1.0m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at In Betweens in the next 16 days are 4.0m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 10s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 4.5ft (1.3m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 4.5ft (1.3m) 10s |
| Most Powerful | 2AM (Tue 8th Sep) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
G’day, Rusty here. Bit of a mixed bag on the radar for In Betweens. We’re looking at a pretty grim start with some serious tropical weather mucking things up, but don’t write the whole window off just yet – there’s a nice little pulse of clean, long-period swell hiding in the second week that could be worth a paddle.
The first few days are messy. We kick off Sunday the 6th with a risk of thunderstorms and a fresh 19 mph cross-off wind, swell around 6 ft from the ENE at 12 seconds. The water here is 81°, which is about normal for this time of year. But the energy is real solid (1761), yet the wind and the threat of storms mean it’s a marginal call at best. Monday the 7th is worse – thunderstorm risks continue, winds are cross-shore at 19 mph, and the swell bumps up to 8 ft. That’s getting into expert territory for size, but with lumpy cross-chop and a combined energy of 2767, it’s more of a wrestle than a wave. Tuesday the 8th is a write-off with strong onshore southerly winds at 22 mph and poor conditions. Wednesday the 9th sees a drop in size to 3 ft from the SSW, but at least the wind eases to a gentle breeze; it’s still only marginal.
We’ve then got a patch of small, cleaner surf from Thursday the 10th through to Monday the 14th morning. Swell sits around 5 ft or less, mostly from the ENE, but the period is short (7-10 seconds), so it’s weak, gutless stuff – combined energy barely scraping 500-600. The wind stays clean across most of these days, but the waves are just ordinary.
Now here’s the standout. From Monday the 14th afternoon through Wednesday the 16th, we get a real treat. A long-period groundswell from the SSW rolls in, starting at 2 ft on Monday afternoon but with a period of 22 seconds – that’s very long and brings proper energy (288). It builds to 2 ft by Tuesday the 15th with a 20-second period and combined energy up around 450, and the wind is light and cross-off or glassy. This is sweet, clean surf for a reef break like In Betweens. The long period means it’ll peel nicely here, with long gaps between sets making paddling out a breeze. Best of the window is likely Tuesday morning and afternoon – small but perfectly clean, with that deep ocean energy. After that, it fades slowly through the rest of the week, with some cross-off breezes and small, clean waves until about Saturday the 19th morning, where we get a glassy, 3 ft set from the SSW with 15-second period and a combined energy of 359. The second week is promising but less certain this far out – still, those mid-week windows look worth booking a session for.
All in all, the first week is a write-off for most, but that 14th to 17th stretch is the one to target. The setup looks interesting for a kite session on those bigger, windier days, but for a paddle, hold out for the clean, long-period glass.
Rusty.
Short Range ForecastHeavy rain (total 39mm), heaviest during Sun night. Warm (max 28°C on Tue afternoon, min 24°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, calm by Tue night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Wed afternoon. Warm (max 27°C on Wed afternoon, min 24°C on Fri night). Winds decreasing (fresh winds from the ENE on Thu morning, light winds from the ESE by Sat morning). | |||||||||||||||||||
Sun 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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 12 | ENE 12 | ENE 12 | ENE 12 | SSW 13 | S 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | SSW 13 | ENE 7 | ENE 7 | SW 16 | SW 16 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 |
Wave Graph | ||||||||||||||||||||
1064 | 1338 | 1703 | 1461 | 5172 | 861 | 638 | 356 | 269 | 257 | 203 | 231 | 203 | 214 | 206 | 308 | 379 | 255 | 209 | 135 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | cross-on | on | cross-on | glassy | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross |
High Tide | 1:21AM0.26m | 1:47PM0.73m | 2:09AM0.32m | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | ||||||||
Low Tide | 8:31PM0.10m | 6:25AM0.07m | 8:57PM0.08m | 7:26AM0.06m | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | |||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | |
mm | 3 | 14 | 5 | 4 | 9 | 3 | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 26 | 27 | 24 | 27 | 26 | 26 | 29 | 31 | 31 | 29 | 27 | 24 | 25 | 24 | 24 | 24 | 24 | 29 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | ENE 12 | SW 12 | ENE 12 | SSW 13 | ENE 11 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | SSW 13 | E 12 | E 12 | SW 16 | ENE 7 | ENE 11 | ENE 11 | SW 15 | ENE 10 | ENE 10 |
1064 | 1338 | 497 | 1461 | 4001 | 785 | 380 | 339 | 186 | 176 | 195 | 141 | 101 | 214 | 151 | 308 | 379 | 242 | 209 | 135 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 14 | SSW 17 | SW 12 | ENE 12 | WSW 10 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | SSW 13 | E 11 | SW 16 | SW 15 | SW 15 | NNE 8 | NNE 9 | NE 9 |
517 | 1048 | 498 | 678 | 1211 | 586 | 638 | 123 | 269 | 257 | 156 | 131 | 93 | 91 | 206 | 229 | 226 | 45 | 49 | 75 | |
Swell 3 Height (m) Direction Period (s) | S 19 | S 18 | SSE 7 | SSW 16 | SSW 15 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | S 7 | SW 16 | SW 18 | SW 11 | E 11 | NNE 8 | SW 9 | SW 8 | SSW 16 | SSW 13 |
180 | 243 | 69 | 582 | 581 | 468 | 220 | 356 | 219 | 166 | 24 | 133 | 155 | 71 | 89 | 50 | 27 | 11 | 99 | 68 | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 12 | ENE 7 | SSW 13 | S 10 | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | — | — | ENE 10 | — | — |
— | — | 1703 | 172 | 5172 | 861 | — | — | — | — | 203 | 231 | 203 | 173 | — | — | — | 255 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 38 | 1 | 148 | 58 | 79 | 126 | 20 | 0 | 1 | 1 | 1 | 30 | 1 | 1 | 30 | 30 | 1 | 1 | 13 | 1 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the In Betweens Surf forecast
The above surf forecast table for In Betweens provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at In Betweens can be found by selecting the local surf guide option on the grey menu. Our In Betweens 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 (In Betweens) 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 In Betweens 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.
In Betweens is 4 km (2 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.










