
Surf Forecasts:
In Betweens surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 11PM (local time) - 5ft (1.5m), 10s period, ENE swell with 462 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 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 1.4m and 10s period with a secondary swell of 1.0m and 8s. 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 1.5m 10s and forecast to arrive on Tuesday (Sep 08) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Monday (Sep 14) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 11PM (Tue 8th Sep) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, let’s get into it.
The ocean’s been pretty quiet lately, and honestly, we’re looking at a bit of a slow stretch ahead. You’re gonna want to pick your moments, and even then, it’s about finding the cleanest option rather than the biggest one. Water temp is sitting right around 81°, which is dead average for this time of year, so no surprises there.
The standout window for the first week is Wednesday afternoon, September 9th. In Betweens is a reef break that’s fairly consistent, and Wednesday arvo we’ve got a clean 3ft of SSW swell wrapping in. Winds are light and offshore, out of the NE, which is going to leave it looking like glass. The combined swell energy is moderate at 563, and with that 13-second period, it should have some real push to it. This is your best bet this week—small but super clean.
Thursday the 10th sees a pulse of ENE windswell, 5ft but with a short 7-second period, that’s a bit of a messy, crumbly wave. The cross-off wind keeps the surface clean, but the quality just isn’t there. You’d be scratching for corners.
Friday eases back to 4ft with a better 11-second period, still from the ENE, but the wind stays cross-off. It’s rideable, but nothing that’s got me rushing out the door. Saturday and Sunday drop off quick into the 2 to 2ft range—not much of anything, just leftovers.
We then hit a proper flat spell from the 13th through the 16th, with waves down below 2ft. That’s a few days of nothing, so don’t get your hopes up for that stretch.
The next real glimmer shows up on Thursday the 17th and Friday the 18th. Another ENE pulse, this time 5 to 6ft with a slightly better 8 to 9-second period. Winds are cross-off again, so it’ll be clean, but that short period still means it’s a bit sectiony. The energy is moderate to strong, with readings around 1014 on Friday, so there’s some grunt in the water. Just not a classic groundswell, but it’s the biggest of the run.
After that, it’s a slow fade again. We stay between 3ft and 5ft through the 20th and 21st, with winds picking up and the swell staying short and choppy. By the 22nd, it’s basically flat, and the 23rd brings a bit of ENE windswell back, around 5 to 5ft, but it’s still short-period stuff.
So, bottom line: it’s not a period for any heroics. The only real standout is that Wednesday arvo on the 9th. For anything else, you’re just looking for a clean wave, not a big one. Given the quiet stretch, the setup looks more interesting for a kite session than a paddle surf, if you’ve got one to hand.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed night. Warm (max 28°C on Tue afternoon, min 24°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the ENE by Thu afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 25°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | SW 16 | ENE 11 | ENE 11 | ENE 10 | SW 15 | SW 16 | SSW 13 | SW 15 | SSW 15 | SW 14 | SW 23 | SW 22 | SW 21 |
Wave Graph | ||||||||||||||||||||
650 | 378 | 269 | 257 | 177 | 231 | 186 | 268 | 314 | 249 | 292 | 242 | 124 | 68 | 107 | 84 | 54 | 86 | 227 | 224 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross | 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 |
High Tide | 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 | 5:31AM0.57m | 5:11PM0.43m | 6:14AM0.58m | 5:40PM0.36m | |||||||
Low Tide | 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 | 11:45AM0.17m | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | |||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | |
6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 29 | 30 | 30 | 30 | 30 | 27 | 25 | 25 | 25 | 25 | 26 | 27 | 26 | 25 | 26 | 25 | 27 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | ENE 7 | SSW 13 | SW 16 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NE 9 | NE 9 | ENE 8 | NE 9 | NE 8 | NE 8 | NE 8 |
477 | 378 | 194 | 140 | 177 | 231 | 129 | 268 | 314 | 249 | 292 | 128 | 98 | 75 | 75 | 75 | 81 | 69 | 55 | 53 | |
Swell 2 Height (m) Direction Period (s) | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | NE 9 | E 5 | E 5 | NE 9 | SW 12 | SW 14 | SW 22 | SW 21 |
650 | 137 | 269 | 257 | 156 | 131 | 101 | 93 | 261 | 229 | 226 | 242 | 77 | 14 | 29 | 79 | 38 | 49 | 227 | 224 | |
Swell 3 Height (m) Direction Period (s) | W 8 | SSW 14 | E 13 | E 13 | SSW 13 | E 12 | SW 18 | S 12 | NNE 8 | NNE 8 | SSW 11 | NE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | SW 14 | SW 23 | SW 14 | SSW 13 |
130 | 356 | 168 | 166 | 176 | 104 | 154 | 67 | 37 | 39 | 23 | 54 | 124 | 68 | 107 | 84 | 54 | 86 | 49 | 68 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ENE 7 | ENE 7 | — | — | — | — | — | — | — | ENE 6 | ENE 6 | ENE 5 | ENE 5 | ENE 5 |
— | — | — | — | — | — | 186 | 136 | — | — | — | — | — | — | — | 33 | 42 | 29 | 29 | 42 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 0 | 1 | 0 | 0 | 30 | 30 | 1 | 1 | 1 | 0 | 6 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 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.










