
Surf Forecasts:
Ruby Bay surf forecast from 10 Sep 2026:
- Most powerful swell: Wednesday 16 Sep, 9AM (local time) - 3ft (0.9m), 7s period, N swell with 70 kJ wave energy.
Best Forecast Surf Conditions for Ruby Bay this week:
The most powerful waves expected at Ruby Bay in the next 16 days are 0.9m 7s and forecast to arrive on Wednesday (Sep 16) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Wednesday (Sep 16) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9AM (Wed 16th Sep) | 3ft (0.9m) 7s |
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 what’s coming down the pipe for Ruby Bay.
Honestly, for the next week and a half, it’s a bit of a flat spell. The first real chance of anything surfable doesn’t show up until Saturday the 19th of September, and even then it’s not much to write home about. The water temp is sitting around 55°F, which is pretty much bang on average for this time of year, so no surprises there.
The only window that even looks like it might produce a wave is on the morning of Saturday the 19th. We’ve got a small 4ft swell rolling in from the north, with a period of 9 seconds – that’s a short-period windswell, so it’ll be a bit crumbly and weak. The combined energy is only moderate at 270, so don’t expect any power. The wind is light and cross-offshore from the WSW, so the surface will be clean, but the waves themselves are pretty ordinary. It’s a beginner-friendly size, but Ruby Bay is a point break that’s sheltered from the north swell, so it’s not going to be firing. The crowd factor is “sometimes” here, so you might have a few others out, but it won’t be crowded.
The next decent pulse doesn’t hit until the morning of Friday the 25th of September. That’s over a week later. We’re looking at 5ft from the north, with a period of 9 seconds, and the combined energy jumps to 417 – strong wave energy. The wind is light from the south, cross-offshore, giving clean conditions. This is the standout of the whole forecast. It’s still a short-period swell, so not the best shape, but it’s the biggest energy we’ll see. The 5ft size is pushing into intermediate territory, but it’s not too big for a confident surfer. The afternoon of that day, the wind swings onshore from the ENE, so the morning is your only window.
Before that, on Thursday the 24th of September, the morning has 5ft from the NNW with a 6-second period – that’s just a weak, choppy windswell, and the combined energy is only 118, so it’s not worth paddling out for.
So, bottom line: the 19th is a tiny, ordinary wave that’s clean, and the 25th is the real shot – just a bit more size and energy, but still a short-period swell. That’s your best bet.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 15°C on Fri morning, min 3°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Very mild (max 18°C on Tue afternoon, min 6°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
AM | 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 7 | NW 21 | N 5 | NW 19 | NW 18 | NNW 17 | NW 16 | NNW 2 | NW 17 | NNW 17 | NNW 5 | NW 16 | NW 16 | NW 16 | NW 15 | N 6 | NW 6 | NNW 6 | N 7 | NNW 6 | NNW 16 |
Wave Graph | |||||||||||||||||||||
1 | 0 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 45 | 70 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | off | off | off | off | off | off | cross-on | off | off | on | glassy | off | glassy | off | off | cross-off | glassy | off | off | off |
High Tide | 9:17AM3.86m | 9:44PM4.16m | 10:02AM4.05m | 10:21PM4.27m | 10:42AM4.16m | 10:57PM4.28m | 11:19AM4.19m | 11:32PM4.22m | 11:53AM4.14m | 00:06AM4.09m | 12:27PM4.03m | 00:40AM3.90m | 1:00PM3.88m | 1:16AM3.67m | |||||||
Low Tide | 3:19PM0.82m | 3:36AM0.56m | 3:59PM0.65m | 4:14AM0.47m | 4:34PM0.57m | 4:50AM0.49m | 5:06PM0.59m | 5:24AM0.58m | 5:36PM0.69m | 5:57AM0.73m | 6:05PM0.86m | 6:32AM0.93m | 6:37PM1.08m | ||||||||
6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:28 | — | — | 6:28 | — | — | |
— | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | |
mm | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 11 | 11 | 6 | 15 | 14 | 8 | 14 | 14 | 9 | 16 | 15 | 10 | 15 | 16 | 9 | 17 | 18 | 11 | 15 | 15 | 6 |
Feels °C | 10 | 8 | 3 | 11 | 10 | 4 | 11 | 11 | 6 | 13 | 12 | 9 | 13 | 14 | 8 | 15 | 15 | 10 | 10 | 10 | 3 |
Swell 1 Height (m) Direction Period (s) | NNW 4 | NNW 5 | NNW 20 | NW 19 | NW 18 | NNW 4 | NW 16 | NW 16 | NW 17 | NNW 17 | NNW 17 | ENE 3 | NW 16 | NW 16 | NNW 4 | NNW 4 | NW 5 | — | N 7 | NNW 6 | NNW 7 |
7 | 7 | 37 | 92 | 82 | 2 | 66 | 66 | 44 | 28 | 28 | 1 | 10 | 10 | 2 | 2 | 28 | — | 70 | 31 | 9 | |
Swell 2 Height (m) Direction Period (s) | N 7 | NW 21 | E 3 | — | NW 6 | NNW 17 | NNW 5 | — | NNW 5 | NNW 3 | — | NNW 4 | NW 5 | NW 5 | NW 15 | NW 15 | NW 15 | — | N 13 | NW 11 | NNW 11 |
1 | 18 | 1 | — | 5 | 29 | 2 | — | 3 | 1 | — | 1 | 1 | 1 | 9 | 9 | 8 | — | 3 | 5 | 12 | |
Swell 3 Height (m) Direction Period (s) | NW 17 | NW 16 | N 5 | — | — | NW 11 | — | — | — | — | — | NW 16 | — | — | — | N 6 | — | — | — | — | NNW 16 |
12 | 10 | 2 | — | — | 5 | — | — | — | — | — | 10 | — | — | — | 1 | — | — | — | — | 24 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | WSW 2 | SW 3 | NNW 2 | WSW 2 | SW 3 | NNW 5 | — | — | — | SW 3 | SW 3 | NW 6 | NNW 6 | — | — | SW 3 |
— | — | — | — | — | 1 | 2 | 1 | 1 | 1 | 2 | — | — | — | 2 | 1 | 122 | 45 | — | — | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 133 | 83 | 85 | 83 | 83 | 125 | 115 | 133 | 83 | 83 | 125 | 38 | 83 | 115 | 83 | 83 | 83 | 14 | 272 | 125 | 14 |
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










