
Surf Forecasts:
In Betweens surf forecast from 15 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 2AM (local time) - 1.5ft (0.5m), 21s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 5PM (local time) - 7ft (2.1m), 9s period, ENE swell with 660 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 2AM (local time) - 1.5ft (0.5m), 21s period with SW 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 Tuesday (Sep 15) at 2AM. The primary swell is predicted to be 0.5m and 21s period. 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 2.1m 9s and forecast to arrive on Thursday (Sep 17) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Sep 16) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 15th Sep) | 1.5ft (0.5m) 21s |
| Best Surf | 2AM (Tue 15th Sep) | 1.5ft (0.5m) 21s |
| Most Powerful | 5PM (Thu 17th Sep) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, I’ve taken a good look through the charts for In Betweens. Gotta be straight with you, this outlook is a tough one. The overall pattern shows a whole lot of wind and not a lot of quality wave face. You’re looking at a solid block of nothing special for the first week and a half. It’s not until late in the period that a real chance pops up, but even then it comes with a catch.
So, In Betweens, a beginner-friendly reef break, is what we’ve got to work with. For the next week, starting Monday the 14th through most of the following week, the wind is howling from the ENE – cross-off, yes, but fresh to strong breezes of 18 to 28 mph. The swell is small, under 3 ft, for the first few days, trade-wind swell basically. The combined wave energy starts weak (288) and builds into moderate territory (over 1000) but the wind is just too strong to produce anything worth a paddle. The water temp is sitting at 81°F, and that’s bang on average for this time of year – no surprises there.
Things get a bit hectic from the 17th. The swell direction swings around to the ENE and jumps up to over 7 ft, but the period drops to a short, gutless 7 to 8 seconds. Couple that with 22 to 28 mph winds? That’s not surf for a beginner’s reef. It’s more like a washing machine. Wave energy spikes into the strong 1100+ range but it’s all messy. This setup looks more interesting for kite surfing than paddle surfing, to be honest. This poor quality hangs around right through until the 25th.
Now, here’s the one window that gets my heart beating a little faster. Late on Monday the 28th into that afternoon, the wind drops right out. We’re talking a light air – 3 mph from the NNE. That’s about as clean as it gets. The swell is a solid 7 ft from the ENE, but the period is a short 7 seconds. That’s the catch. The real standout is Tuesday the 29th afternoon, with 7 ft from the ENE. The wind is a light 6 mph cross-on, but it’s still a step up. For this break, that’s the best on offer. You’ll have to take the shore break crowds, because it gets "sometimes" busy here, but when the wind is that calm, it’ll be worth it for a few clean ones. The swell is over 5 ft though, so this is out of the zone for beginners.
After that, the forecast fades out with small, short-period swell and a return of the wind. You wait a long time for the right moment, but late on the 28th and into the 29th is your shot. Keep an eye on it.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Mon night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Thu night. Warm (max 27°C on Thu afternoon, min 25°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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) | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | ENE 7 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | E 7 | E 7 | ENE 8 | ENE 7 |
Wave Graph | ||||||||||||||||||||
227 | 224 | 392 | 384 | 470 | 455 | 541 | 429 | 508 | 660 | 644 | 622 | 580 | 539 | 428 | 404 | 411 | 400 | 375 | 365 | |
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-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 | 5:40PM0.36m | 7:02AM0.58m | 6:07PM0.30m | 7:59AM0.57m | 6:32PM0.25m | 9:10AM0.56m | 7:25PM0.21m | 10:27AM0.57m | 11:01PM0.21m | 11:34AM0.59m | 00:19AM0.23m | 12:26PM0.61m | 00:59AM0.27m | |||||||
Low Tide | 11:42PM0.08m | 2:03PM0.23m | 00:07AM0.11m | 4:06PM0.24m | 00:38AM0.13m | 7:14PM0.21m | 1:26AM0.16m | 7:23PM0.18m | 2:56AM0.18m | 7:43PM0.16m | 4:35AM0.17m | 8:01PM0.15m | ||||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | 5 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 26 | 27 | 28 | 28 | 26 | 26 | 26 | 26 | 27 | 26 | 25 | 25 | 24 | 24 | 26 | 26 | 24 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 22 | NE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 |
227 | 78 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 | 622 | 580 | 539 | 382 | 387 | 350 | 296 | 300 | 346 | |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 21 | ENE 8 | E 12 | E 11 | SW 12 | SW 11 | SSW 11 | SSW 20 | SSW 19 | WSW 10 | SSE 9 | SSE 7 | SSE 7 | SSW 18 | SSE 6 | SW 16 | SW 15 | SW 15 | SW 15 |
49 | 224 | 47 | 68 | 58 | 35 | 31 | 12 | 149 | 210 | 9 | 8 | 19 | 19 | 108 | 15 | 121 | 115 | 104 | 33 | |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 13 | NNE 8 | ENE 8 | SW 12 | S 9 | WSW 8 | SE 11 | SW 11 | SSE 10 | SSE 10 | W 9 | W 9 | S 20 | SSE 9 | S 18 | SSW 14 | SE 8 | W 13 | W 12 |
12 | 68 | 36 | 19 | 38 | 6 | 7 | 5 | 18 | 10 | 9 | 7 | 7 | 67 | 7 | 99 | 37 | 3 | 3 | 12 | |
Wind waves Height (m) Direction Period (s) | NE 8 | — | NE 8 | NE 8 | NE 5 | ENE 10 | ENE 10 | ENE 6 | ENE 7 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | E 7 | E 7 | ENE 8 | ENE 7 |
112 | — | 75 | 71 | 64 | 292 | 427 | 241 | 508 | 660 | 608 | 494 | 416 | 461 | 428 | 404 | 411 | 400 | 375 | 365 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 1 | 1 | 2 | 30 | 126 | 2 | 30 | 32 | 30 | 32 | 38 | 30 | 31 | 30 | 30 | 30 | 38 | 32 |
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.










