Surf Forecasts:
Ruby Bay surf forecast from 28 Aug 2026:
- Best quality surf: Saturday 29 Aug, 12AM (local time) - 4.5ft (1.3m), 9s period, N swell with offshore winds.
- Most powerful swell: Saturday 29 Aug, 12AM (local time) - 4.5ft (1.3m), 9s period, N swell with 262 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 12AM (local time) - 4.5ft (1.3m), 9s period with N swell.
Best Forecast Surf Conditions for Ruby Bay this week:
The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 29) at 12AM. The primary swell is predicted to be 1.3m and 9s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ruby Bay in the next 16 days are 1.3m 9s and forecast to arrive on Saturday (Aug 29) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Tuesday (Sep 01) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 29th Aug) | 4.5ft (1.3m) 9s |
| Best Surf | 12AM (Sat 29th Aug) | 4.5ft (1.3m) 9s |
| Most Powerful | 12AM (Sat 29th Aug) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the next couple of weeks for Ruby Bay. I’ll be straight with you—this isn’t a classic stretch for us. The long-range picture is pretty lean, and there’s a big dry spell right in the middle. Let’s break it down.
The window opens this Friday afternoon, 28 August, but it’s a bit of a tease. We’ve got a 8ft swell pushing in from the north, with a period of 9 seconds. The energy’s moderate at 805, but the wind is cross-on from the north at 10 km/h, and the conditions are rated poor. The water temperature is sitting at 54°, which is about average for this time of year, nothing unusual. Not a great start, but it’s something.
The rest of the weekend and most of the following week are a write-off. Saturday the 29th through to Thursday the 3rd of September sees barely any swell, with combined energy values dropping to near zero. There’s a few clean offshore mornings, but without any waves, it’s just a flat lake. That’s a solid six-day gap of nothing.
Things start to look a little more promising by late in the second week. On Tuesday morning, 8 September, we get a 4ft north swell, 10-second period, moderate energy at 333, and glassy conditions. The comment says “surfable waves but very ordinary conditions,” so it’s not a standout, but it’s the best we’ve got. The wind is calm and glassy, which is a positive. Wednesday morning the 9th brings offshore winds from the SSW at 10 km/h, but there’s no swell to speak of.
The best of the whole run, if you can call it that, is Saturday morning, 12 September. We’ve got a 2ft north swell, 7-second period, and moderate offshore winds from the SW at 20 km/h. The energy is only 54, so it’s weak, but the wind is clean and offshore. It’s not going to be pumping, but it’ll be a clean little session for those who are keen on a small wave. Just remember, this is a spot that rarely breaks, so don’t get your hopes too high.
Overall, the swell is small and inconsistent. The best option is the Tuesday morning glassy session on the 8th, but it’s not a day to call in sick for. Keep an eye on the forecasts, but for now, it’s a quiet stretch.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Fri afternoon. Very mild (max 15°C on Sat afternoon, min 6°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Wed afternoon, min 4°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | N 9 | N 9 | N 8 | N 21 | NNW 7 | N 8 | N 8 | NW 16 | NW 15 | NW 15 | NW 7 | NW 14 | NW 14 | N 4 | NNW 15 | NNW 5 | NW 6 | N 6 | NNW 5 | N 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 805 | 262 | 65 | 8 | 0 | 5 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 0 | 0 | 75 | 0 | 27 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | off | off | off | off | cross-off | off | off | cross-off | cross-off | off | cross-on | off | off | off | glassy | glassy | glassy | glassy |
High Tide | 10:29PM4.06m | 10:51AM3.89m | 11:01PM4.17m | 11:27AM3.97m | 11:34PM4.21m | 12:03PM4.01m | 00:09AM4.17m | 12:37PM3.98m | 00:46AM4.05m | 1:12PM3.90m | 1:27AM3.87m | 1:50PM3.74m | 2:15AM3.64m | |||||||
Low Tide | 4:08PM0.81m | 4:17AM0.88m | 4:39PM0.68m | 4:49AM0.73m | 5:10PM0.62m | 5:22AM0.65m | 5:43PM0.63m | 5:56AM0.66m | 6:16PM0.71m | 6:33AM0.77m | 6:54PM0.87m | 7:14AM0.95m | 7:38PM1.09m | |||||||
 |  |  |  | | | |  | | | | | | | | |  | | | | |
 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — |
 | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — |
mm | 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 11 | 14 | 15 | 8 | 15 | 14 | 12 | 13 | 12 | 12 | 13 | 13 | 7 | 14 | 16 | 11 | 15 | 16 | 14 |
Feels °C | 12 | 10 | 10 | 11 | 4 | 12 | 12 | 7 | 8 | 7 | 8 | 10 | 10 | 5 | 10 | 12 | 9 | 15 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | — | N 9 | N 8 | N 8 | NNW 7 | NNW 4 | NW 4 | NNW 4 | NW 15 | NW 7 | NNW 5 | N 7 | — | NNE 4 | NNW 6 | NNW 5 | NNW 5 | N 6 | NW 15 | N 6 |
| kJ | — | 262 | 65 | 30 | 18 | 1 | 10 | 7 | 55 | 12 | 32 | 28 | — | 16 | 4 | 16 | 13 | 22 | 9 | 38 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 19 | N 8 | NW 16 | NW 16 | NNW 4 | NW 15 | NW 10 | NW 14 | NW 14 | NNW 15 | NNW 15 | NW 16 | NW 15 | NW 15 | — | NW 15 |
| kJ | — | — | — | — | 14 | 5 | 10 | 39 | 2 | 56 | 26 | 51 | 155 | 22 | 23 | 9 | 9 | 9 | — | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | NW 13 | N 21 | — | NW 18 | N 8 | NW 11 | NW 7 | — | NNW 14 | — | — | — | — | NW 18 | — | — | — | — |
| kJ | — | — | 7 | 8 | — | 12 | 5 | 18 | 2 | — | 21 | — | — | — | — | 12 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 9 | — | WSW 2 | SW 3 | WSW 2 | W 3 | — | — | SW 3 | — | NW 7 | SW 2 | N 14 | N 4 | SW 3 | — | NW 6 | — | NNW 5 | — |
| kJ | 805 | — | 1 | 2 | 1 | 1 | — | — | 3 | — | 246 | 1 | 153 | 19 | 2 | — | 75 | — | 27 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 129 | 0 | 14 | 83 | 83 | 116 | 115 | 179 | 83 | 129 | 115 | 382 | 199 | 14 | 83 | 83 | 14 | 83 | 83 | 83 |
Best forecast wave conditions in Nelson - Tasman Bay | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
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Information about the Ruby Bay Surf forecast
The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby Bay 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 (Ruby Bay) 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 Ruby Bay 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.
Are you planning a holiday in Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away
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