Surf Forecasts:
In Betweens surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 7ft (2.1m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,395 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 7ft (2.1m), 12s 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 Monday (Sep 07) at 2AM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 1.6m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at In Betweens in the next 16 days are 3.5m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 11s period and expected on Tuesday (Sep 08) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 7ft (2.1m) 12s |
| Best Surf | 2AM (Mon 7th Sep) | 7ft (2.1m) 12s |
| Most Powerful | 8PM (Mon 7th Sep) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down in feet and miles.
The only break in the game is In Betweens, a beginner-friendly reef. But let’s be real – the first week and a half is a tough slog. There’s a big gap of nothing special before we get a decent window.
The standout is Saturday, September 19th. The afternoon is your best bet. We’re looking at a clean 7 ft swell from the ENE, with the wind dropping to almost nothing – a light cross-off breeze that’ll leave the surface glassy. The wave energy is moderate, at 1180. The period is a short 9 seconds, so it’ll be fun and playful, not too heavy. The water is 81°F, which is right on the average for this time of year. Conditions are excellent for experienced surfers, but crowds at In Betweens can pop up sometimes, so be ready.
The morning of the 19th is also decent with 8 ft from the ENE, but the wind is a light cross, making it a little less clean. The energy is a bit stronger at 1861, but still moderate.
The rest of the forecast is mostly marginal. Monday the 7th has a 7 ft SW groundswell with a 14-second period, but the wind is onshore and it gets messy. From the 15th to the 18th, there’s a long-period SSW swell, but it’s tiny – only 2 ft to 3 ft. You’ll be waiting for waves that never really show.
So, mark your calendar for Saturday, September 19th afternoon. That’s the one. Everything else is a pass.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Sun night. Warm (max 27°C on Sat afternoon, min 25°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Mon night. Warm (max 27°C on Mon 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). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 | E 13 | ENE 13 | E 13 | ENE 12 | ENE 12 | ENE 12 | SW 14 | SW 15 | SSW 12 | ENE 11 | ENE 10 | SSW 14 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 577 | 1807 | 1465 | 1474 | 1538 | 1100 | 960 | 1200 | 1536 | 3059 | 3566 | 802 | 530 | 289 | 273 | 204 | 242 | 321 | 281 | 249 |
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 | cross-on | cross-on | on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:35PM0.19m | 12:05PM0.69m | 00:18AM0.21m | 1:00PM0.73m | 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 | |||||||
Low Tide | 7:30PM0.17m | 3:46AM0.09m | 8:03PM0.13m | 5:11AM0.08m | 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 | |||||||
 |  | | |  |  |  |  |  | |  |  | | | | | | | | | |
 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | — | 8 | 1 | 2 | 4 | 2 | 2 | — | 1 | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 22 | 23 | 24 | 25 | 25 | 25 | 25 | 26 | 28 | 26 | 27 | 28 | 28 | 31 | 29 | 26 | 26 | 25 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | E 14 | S 12 | S 12 | SSW 12 | E 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | SW 15 | SW 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | E 12 | SSW 13 | E 12 | ENE 7 |
| kJ | 577 | 504 | 647 | 569 | 1538 | 1100 | 960 | 1200 | 1344 | 3059 | 2963 | 802 | 530 | 261 | 169 | 146 | 146 | 131 | 139 | 249 |
Swell 2 Height (m) Direction Period (s) | S 11 | N 11 | SSW 18 | SW 18 | SSW 12 | SSW 12 | SSW 11 | SSW 14 | SW 14 | ENE 13 | ENE 12 | W 11 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | E 12 | SSW 12 | E 12 |
| kJ | 244 | 10 | 62 | 79 | 404 | 368 | 408 | 1057 | 1536 | 1379 | 1102 | 658 | 313 | 140 | 273 | 204 | 133 | 104 | 89 | 144 |
Swell 3 Height (m) Direction Period (s) | S 13 | SSW 20 | NNE 10 | NNE 10 | SSW 16 | SSW 16 | SW 15 | S 18 | SSW 17 | S 8 | SSW 15 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | SSW 8 | SSW 16 | SW 18 | SW 16 |
| kJ | 280 | 38 | 20 | 19 | 166 | 223 | 236 | 243 | 492 | 127 | 512 | 474 | 175 | 289 | 225 | 166 | 45 | 181 | 154 | 211 |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 14 | E 13 | ENE 13 | ENE 13 | — | — | — | — | SSE 8 | SSW 12 | SSW 9 | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | — |
| kJ | 328 | 1807 | 1465 | 1474 | 816 | — | — | — | — | 270 | 3566 | 567 | — | — | — | — | 242 | 321 | 281 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 39 | 30 | 30 | 31 | 1 | 30 | 1 | 0 | 46 | 58 | 46 | 48 | 20 | 16 | 3 | 30 | 30 | 30 | 38 | 3 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.
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