Surf Forecasts:
Ruby Bay surf forecast from 29 Jul 2026:
- Best quality surf: Thursday 30 Jul, 9PM (local time) - 6ft (1.8m), 7s period, N swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 9PM (local time) - 6ft (1.8m), 7s period, N swell with 297 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 9PM (local time) - 6ft (1.8m), 7s 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 Thursday (Jul 30) at 9PM. The primary swell is predicted to be 1.8m and 7s 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 1.8m 7s and forecast to arrive on Thursday (Jul 30) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Friday (Jul 31) at 12AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 30th Jul) | 6ft (1.8m) 7s |
| Best Surf | 9PM (Thu 30th Jul) | 6ft (1.8m) 7s |
| Most Powerful | 9PM (Thu 30th Jul) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright, I'm gonna level with you. For the next 16 days, Ruby Bay is giving us absolutely nothing to work with. It's one of those rare, flat spells where the surf just doesn't rock up. It's a point break, tucked away from the northerly swell that tries to push in, and it's a beginner-friendly spot that rarely breaks anyway. The whole period is a flat, glassy pond with no real wave energy. The water temp is about average for the time of year.
Starting Thursday morning, July 30th, we get a tiny pulse of 3ft swell from the north with a short period of 6 seconds. The combined energy is weak (99), and the wind is glassy, but the surf is poor. That's the best we see, and it's not good. By Thursday afternoon, the energy drops to 64, and it's cross-on. From Friday, July 31st, right through to the end of the first week, it's all zeros. The swell height is a flat dash or 0.3ft, and the energy is either 0 or 1. The wind is often offshore or glassy, but with no waves, it doesn't matter.
The second week is more of the same. There's a little bump on Monday, August 10th, with a 4ft swell from the southeast, period of 5 seconds, and moderate energy (61). The wind is offshore, so it would be clean, but the wave comment says "poor surf conditions." That's the only thing that even registers. Then it's back to nothing. The rest of the week into August 14th is flat, with just tiny 0.3ft pulses and no energy.
Honestly, unless you want to sit on a glassy board and stare at the horizon, there's nothing to paddle out for. The setup is more interesting for a kite surfer on a windy day, but for us wave hunters, it's a blank run. Forecasts can change, but in this area, a spell like this isn't completely abnormal. Hang tight.
Rusty
Short Range ForecastModerate rain (total 13mm), heaviest on Thu night. Very mild (max 13°C on Thu afternoon, min 4°C on Sat morning). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue morning. Very mild (max 14°C on Mon morning, min 3°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
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 5 | N 6 | N 6 | N 7 | NNW 8 | NNW 8 | N 8 | N 8 | NE 5 | NE 4 | N 6 | N 6 | NW 21 | NW 19 | NW 18 | NW 17 | NW 16 | ENE 4 | NE 4 |
Wave Graph  | |||||||||||||||||||
 kJ | 18 | 62 | 64 | 210 | 0 | 0 | 84 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | cross-off | cross-off | cross-off | cross-off | off | glassy | off | off | on | off | off | off | off | glassy | on | glassy |
High Tide | 10:19PM3.89m | 10:33AM3.72m | 10:53PM4.00m | 11:11AM3.81m | 11:26PM4.08m | 11:48AM3.84m | 00:00AM4.12m | 12:25PM3.84m | 00:35AM4.10m | 1:02PM3.81m | 1:11AM4.02m | 1:39PM3.75m | 1:51AM3.89m | ||||||
Low Tide | 4:03AM1.18m | 4:34PM0.99m | 4:37AM1.06m | 5:07PM0.85m | 5:11AM0.95m | 5:38PM0.78m | 5:47AM0.88m | 6:10PM0.79m | 6:22AM0.86m | 6:42PM0.87m | 7:00AM0.90m | 7:19PM1.00m | |||||||
 |  |  |  |  | |  | | | | | | | |  |  | | | | |
 | — | 7:37 | — | — | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — |
 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — |
mm | — | — | 1 | 11 | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — | 1 |
Temp °C | 7 | 11 | 13 | 11 | 11 | 10 | 8 | 9 | 11 | 4 | 10 | 10 | 5 | 14 | 14 | 9 | 10 | 10 | 9 |
Feels °C | 5 | 10 | 11 | 9 | 6 | 5 | 6 | 5 | 8 | 1 | 7 | 7 | 1 | 10 | 9 | 5 | 9 | 8 | 8 |
Swell 1 Height (m) Direction Period (s) | N 5 | N 5 | — | N 7 | — | NW 16 | N 8 | N 8 | NNW 7 | NNW 7 | N 6 | N 6 | NW 6 | NW 4 | NW 4 | NNW 4 | ENE 5 | NW 15 | NW 15 |
| kJ | 18 | 37 | — | 210 | — | 10 | 84 | 46 | 18 | 5 | 1 | 1 | 1 | 1 | 4 | 2 | 2 | 9 | 8 |
Swell 2 Height (m) Direction Period (s) | NW 14 | NW 17 | — | N 19 | — | — | NNW 14 | NNW 14 | NE 5 | — | — | NW 12 | — | NW 19 | NW 18 | NW 17 | NW 4 | N 6 | — |
| kJ | 8 | 12 | — | 7 | — | — | 138 | 20 | 1 | — | — | 5 | — | 14 | 12 | 11 | 1 | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | N 15 | — | — | — | — | NW 14 | NE 4 | — | NW 19 | NW 21 | NW 7 | — | NW 11 | NW 16 | — | NW 18 |
| kJ | — | — | — | 5 | — | — | — | — | 8 | 1 | — | 14 | 17 | 2 | — | 4 | 10 | — | 13 |
Wind waves Height (m) Direction Period (s) | NW 4 | N 6 | N 6 | NNW 8 | NNW 8 | NNW 8 | — | SSW 2 | — | — | — | — | SW 2 | W 3 | WSW 2 | — | — | ENE 4 | NE 4 |
| kJ | 10 | 62 | 64 | 551 | 192 | 207 | — | 1 | — | — | — | — | 2 | 2 | 1 | — | — | 2 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 83 | 14 | 129 | 0 | 129 | 125 | 14 | 14 | 38 | 83 | 83 | 83 | 83 | 83 | 83 | 142 | 83 | 83 | 88 |
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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