Surf Forecasts:
Ruby Bay surf forecast from 29 Aug 2026:
- Most powerful swell: Thursday 3 Sep, 12AM (local time) - 4ft (1.2m), 6s period, NW swell with 102 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 1.2m 6s and forecast to arrive on Thursday (Sep 03) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Friday (Sep 04) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12AM (Thu 3rd Sep) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Well, mate, I’ve gotta be straight with you—Ruby Bay is in a bit of a flat spell and it’s going to be a long wait before anything worth paddling out for shows up. This is a point break that’s sheltered and rarely breaks, so blank runs aren’t unheard of around here. The water’s sitting at about 54°—pretty much normal for this time of year, nothing wild there.
The forecast starts with the last few days of August and the first week of September, and honestly, there’s just nothing going on. You’ll see a few tiny bumps of 0.3 ft to 0.7 ft from the north, with periods all over the place but swells barely registering any energy (combined energy mostly in single digits). The winds are light and often offshore or glassy, so it’s clean, but there’s just no swell to work with. That stretch from 29 August through to early September is a total write-off—days of zeros and “poor surf conditions” across the board.
Then around 6 September, Sunday morning, we get a little spike: 3 ft from the NNW with a short 6-second period, combined energy at 47—still weak, but it’s something. The wind is glassy calm, so it’d be clean. But by the afternoon, the wind swings onshore and bumps it up to 4 ft from the north, energy jumps to 163 (moderate), but it’s cross-onshore and choppy—not great for a paddle, maybe more interesting for a kite session. That’s the only real pulse in the first week and a half.
After that, it’s back to flatness until 9 September, Wednesday afternoon. That’s the standout in the whole 16-day window. We get 8 ft from the north, with a 9-second period and combined energy of 1158—that’s strong wave energy. The wind is cross-offshore from the west, keeping it clean. That’s a solid, powerful swell, but at 8 ft it’s really only for experienced surfers, and with a relatively short period it’s going to be a bit crumbly on a point break. Still, it’s the best we’ve got. The next morning, 10 September, drops to 4 ft from the north, 10-second period, energy at 277—still moderate, and the wind is light offshore, so it’ll be rideable, but nothing special.
The rest of the second week fades back to flat with no swell and glassy or light winds, so don’t hold your breath after that Wednesday.
Bottom line: if you’re an experienced surfer, mark Wednesday 9 September afternoon for a chance at some solid, clean 8 ft north swell at Ruby Bay. The rest of the forecast is a bust—small, weak, or nothing at all.
Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Sun morning, min 7°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu night. Very mild (max 17°C on Fri morning, min 6°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 21 | NNW 7 | N 8 | N 8 | NW 16 | NW 15 | NW 15 | NW 6 | NNW 7 | N 3 | NNW 15 | N 18 | NW 5 | NW 6 | N 15 | N 15 | NNW 7 | NW 8 | NNW 8 | NW 16 |
Wave Graph | ||||||||||||||||||||
8 | 0 | 5 | 1 | 0 | 0 | 0 | 60 | 0 | 7 | 0 | 6 | 0 | 102 | 4 | 4 | 0 | 0 | 0 | 0 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross | glassy | glassy | glassy | off | off | cross-off |
High Tide | 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 | 2:34PM3.52m | ||||||||
Low Tide | 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 | 8:03AM1.17m | 8:39PM1.34m | |||||||
— | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | |
6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 14 | 8 | 15 | 15 | 12 | 14 | 13 | 12 | 12 | 13 | 8 | 15 | 16 | 12 | 14 | 16 | 12 | 17 | 15 | 10 |
Feels °C | 11 | 5 | 12 | 11 | 6 | 9 | 8 | 7 | 8 | 9 | 5 | 12 | 12 | 11 | 14 | 15 | 11 | 14 | 10 | 7 |
Swell 1 Height (m) Direction Period (s) | N 8 | NNW 7 | NW 4 | NW 4 | NNW 4 | NW 15 | NNW 5 | NNW 4 | NNW 7 | NNW 14 | ENE 3 | NNW 6 | NW 5 | NNW 5 | N 6 | N 15 | — | N 8 | NNW 8 | N 7 |
30 | 18 | 3 | 4 | 7 | 34 | 12 | 7 | 16 | 20 | 1 | 3 | 28 | 24 | 81 | 4 | — | 142 | 99 | 26 | |
Swell 2 Height (m) Direction Period (s) | N 21 | NW 19 | N 8 | NW 16 | NW 16 | — | NW 15 | NW 15 | NNW 14 | NW 14 | NNW 15 | NW 15 | NW 17 | NW 15 | N 15 | — | — | NW 16 | NW 16 | NW 16 |
8 | 14 | 5 | 10 | 38 | — | 54 | 33 | 20 | 89 | 21 | 9 | 11 | 9 | 4 | — | — | 11 | 10 | 63 | |
Swell 3 Height (m) Direction Period (s) | — | — | NW 18 | N 8 | — | — | — | — | — | — | NNW 5 | N 18 | NW 14 | — | — | — | — | — | — | — |
— | — | 12 | 1 | — | — | — | — | — | — | 2 | 6 | 8 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SW 3 | — | — | — | NW 7 | — | NW 6 | — | N 3 | — | — | — | NW 6 | NW 7 | N 6 | NNW 7 | NW 8 | W 2 | — |
— | 3 | — | — | — | 11 | — | 60 | — | 7 | — | — | — | 102 | 332 | 104 | 156 | 450 | 1 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 30 | 83 | 115 | 115 | 116 | 83 | 129 | 186 | 83 | 116 | 83 | 83 | 83 | 14 | 14 | 14 | 14 | 115 | 115 | 115 |
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











