Surf Forecasts:
Ruby Bay surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 9AM (local time) - 6ft (1.9m), 9s period, N swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 9AM (local time) - 6ft (1.9m), 9s period, N swell with 567 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 9AM (local time) - 6ft (1.9m), 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 Friday (Sep 04) at 9AM. The primary swell is predicted to be 1.9m and 9s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ruby Bay in the next 16 days are 1.9m 9s and forecast to arrive on Friday (Sep 04) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Friday (Sep 04) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 4th Sep) | 6ft (1.9m) 9s |
| Best Surf | 9AM (Fri 4th Sep) | 6ft (1.9m) 9s |
| Most Powerful | 9AM (Fri 4th Sep) | 6ft (1.9m) 9s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright, folks, ol’ Rusty here. Let’s be straight with you: it’s a quiet stretch for Ruby Bay. We’ve got a solid 16-day window but the surf is barely a whisper through most of it. There’s a few days where you might paddle out, but don’t expect much.
The pattern starts with nothing. August 31st through the whole of the first week is flat as a pancake, with the combined energy of all swells directed here at zero (0) more often than not. Strong offshore winds on the 1st and 2nd keep the surface clean, but there’s no swell to ride. It’s a classic case of “the ocean is taking a nap.”
Then, on Friday the 4th, we get a little spike. The morning shows a 6 ft swell from the North, with a period of 9 seconds. The combined energy of all swells directed here hits a moderate 567, which is about the only real pulse in the entire forecast. The wind is a light offshore breeze from the West, keeping things clean. This is the best the window has to offer, but it’s still a “poor surf conditions” read for the day overall. The swell is a bit over 5 ft, so it’s a bit much for total beginners, but for anyone who’s been out a few times, it’s the only game in town. The water temp is about 54°F and the anomaly is 0.0°, so it’s about average for this time of year.
The afternoon of the 4th drops off quick, and we’re back to next to nothing. Sunday the 6th has a weak 5 ft, 7-second swell from the North (combined energy 210) but it’s accompanied by rain and a light offshore, so it’s surfable but very ordinary. After that, the rest of the 16 days is a string of 0.3 ft or flat conditions, glassy mornings, and onshore afternoon breezes, especially from the 7th onwards. The combined energy of all swells directed here is mostly in the single digits or low double digits for the rest of the run.
So, the only standout is the morning of Friday the 4th. It’s not going to be epic, but it’s the only time the ocean gives you a pulse. For a break that rarely breaks, this is about as good as it gets in this window. Don’t expect crowds because it’s rarely breaking, but if you’re there on that morning, you might have it to yourself. The rest of the forecast is a write-off. Costa’s not looking good for paddle surfing, folks.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Thu morning, min 7°C on Mon night). Winds decreasing (fresh winds from the WSW on Mon afternoon, calm by Thu morning). | Days 5-7 Weather SummaryHeavy rain (total 29mm), heaviest during Thu night. Very mild (max 16°C on Thu afternoon, min 6°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | NW 11 | NNW 14 | NW 15 | NNW 15 | NW 5 | N 18 | NNW 5 | NNW 6 | N 15 | N 6 | NNW 7 | N 9 | N 9 | N 8 | NW 15 | NW 15 | NW 6 | N 6 | N 7 | NNW 8 |
Wave Graph | ||||||||||||||||||||
0 | 0 | 0 | 0 | 0 | 6 | 0 | 47 | 4 | 73 | 0 | 567 | 181 | 92 | 0 | 0 | 83 | 0 | 210 | 0 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | cross-off | glassy | glassy | glassy | cross | cross-off | cross-off | off | off | cross | glassy | glassy | off | off |
High Tide | 00:09AM4.17m | 12:37PM3.98m | 00:46AM4.05m | 1:12PM3.90m | 1:27AM3.87m | 1:50PM3.74m | 2:15AM3.64m | 2:34PM3.52m | 3:13AM3.42m | 3:37PM3.28m | 4:28AM3.25m | 5:21PM3.15m | ||||||||
Low Tide | 5:43PM0.63m | 5:56AM0.66m | 6:16PM0.71m | 6:33AM0.77m | 6:54PM0.87m | 7:14AM0.95m | 7:38PM1.09m | 8:03AM1.17m | 8:39PM1.34m | 9:04AM1.39m | 10:10PM1.53m | 10:24AM1.54m | 11:47PM1.50m | |||||||
— | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | |
6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 13 | 2 | — | — | — | — | 1 | 13 | 1 | — |
Temp °C | 12 | 10 | 12 | 13 | 10 | 15 | 15 | 12 | 16 | 16 | 13 | 14 | 14 | 8 | 15 | 15 | 8 | 11 | 13 | 8 |
Feels °C | 5 | 4 | 7 | 8 | 6 | 11 | 12 | 11 | 15 | 15 | 13 | 12 | 9 | 5 | 12 | 12 | 5 | 10 | 11 | 6 |
Swell 1 Height (m) Direction Period (s) | NNW 5 | NNW 14 | NW 15 | NNW 15 | NW 5 | NW 5 | NNW 5 | — | NNW 6 | N 15 | — | N 9 | N 9 | N 8 | N 8 | NW 5 | NNW 5 | — | N 7 | NNW 8 |
9 | 138 | 55 | 21 | 7 | 6 | 16 | — | 58 | 4 | — | 567 | 181 | 92 | 44 | 11 | 18 | — | 210 | 96 | |
Swell 2 Height (m) Direction Period (s) | NW 11 | — | NNW 6 | NNW 6 | NW 15 | NW 15 | NW 17 | — | N 15 | — | — | — | NW 16 | NW 15 | NW 15 | NNW 7 | NW 15 | — | NNW 16 | NNW 16 |
31 | — | 8 | 4 | 9 | 9 | 12 | — | 4 | — | — | — | 10 | 9 | 55 | 10 | 59 | — | 26 | 25 | |
Swell 3 Height (m) Direction Period (s) | NNW 15 | — | — | — | NW 20 | N 18 | — | — | — | — | — | — | — | — | — | NW 15 | — | — | — | — |
21 | — | — | — | 15 | 6 | — | — | — | — | — | — | — | — | — | 54 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | WSW 3 | — | — | W 2 | WSW 2 | — | NNW 6 | NW 6 | N 6 | NNW 7 | NW 16 | WNW 3 | — | — | — | NW 6 | N 6 | — | — |
— | 3 | — | — | 1 | 1 | — | 47 | 223 | 73 | 111 | 10 | 3 | — | — | — | 83 | 188 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 115 | 83 | 83 | 83 | 83 | 83 | 115 | 14 | 14 | 14 | 129 | 0 | 125 | 14 | 14 | 129 | 14 | 288 | 0 | 14 |
Best forecast wave conditions in Nelson - Tasman Bay | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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











