Surf Forecasts:
Ruby Bay surf forecast from 7 Aug 2026:
- Best quality surf: Sunday 9 Aug, 3PM (local time) - 4.5ft (1.3m), 10s period, N swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 6AM (local time) - 6ft (1.8m), 9s period, N swell with 538 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 3PM (local time) - 4.5ft (1.3m), 10s 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 Sunday (Aug 09) at 3PM. The primary swell is predicted to be 1.3m and 10s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Ruby Bay in the next 16 days are 1.8m 9s and forecast to arrive on Sunday (Aug 09) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 10s period and expected on Sunday (Aug 09) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sun 9th Aug) | 4.5ft (1.3m) 10s |
| Best Surf | 3PM (Sun 9th Aug) | 4.5ft (1.3m) 10s |
| Most Powerful | 6AM (Sun 9th Aug) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
G’day, I’m Rusty, and I’ve been staring at the charts for Ruby Bay. Let’s get straight into it.
Honestly, mate, this is a tough stretch. Ruby Bay is a point break that’s sheltered and rarely breaks, and the next 16 days are looking pretty grim. There’s a big gap of nothing at the start until a bit of action shows up around Sunday the 9th of August, but even then, it’s nothing to write home about.
The best of a bad bunch is Sunday morning, the 9th of August. We’ve got a north swell pushing 5 ft, with a period of 10 seconds, and the combined energy is moderate at 484. The wind is light and cross-shore, so it’s not ideal, but it’s the only time the swell gets over 3 ft. That’s about the only window where the waves might be worth a look, though the conditions are only marginal. For a more experienced surfer, this could be a session, but the break is a point, so that longer-period groundswell might actually help shape things up a bit. Beginners, stay away – 5 ft is a bit much for you.
Sunday afternoon sees the swell drop to 4 ft, with glassy conditions from the southwest, but the energy is still moderate at 327. It’s surfable, but very ordinary.
After that, it’s back to tiny, weak stuff. The rest of the week and into the second week, we’re looking at swells mostly under 3 ft, with combined energy values in the double digits – weak, weak, weak. From Monday the 10th right through to Saturday the 22nd of August, the forecast is a whole lot of “poor surf conditions” and zeros. The water temperature is about average for this time of year, so no surprises there.
The long-range stuff around the 22nd of August shows a tiny 0.3 ft swell with a very long period of 18 seconds – that’s a groundswell, but it’s so small it’s not worth getting excited about. The wind is onshore, so it’s not clean either.
Look, if you’re desperate for a paddle, Sunday the 9th of August is your only realistic chance. Otherwise, it’s a blank run for Ruby Bay. This is a spot that rarely breaks, so it’s not a shock, but it’s still a bummer. I'd keep an eye on the forecast, but for now, leave the board in the car.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Sat night. Very mild (max 15°C on Sun afternoon, min 7°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Wed afternoon. Very mild (max 13°C on Thu afternoon, min 8°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 5 | N 5 | N 6 | N 10 | N 10 | N 9 | N 8 | N 8 | N 8 | N 8 | N 7 | N 7 | N 6 | N 8 | N 8 | N 7 | N 6 | N 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 11 | 12 | 108 | 484 | 327 | 133 | 0 | 0 | 19 | 10 | 10 | 4 | 25 | 89 | 164 | 72 | 32 | 44 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | on | on | cross | glassy | off | off | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | on | glassy |
High Tide | 4:39AM3.42m | 5:21PM3.27m | 5:58AM3.39m | 7:11PM3.37m | 7:18AM3.49m | 8:26PM3.68m | 8:29AM3.68m | 9:19PM4.01m | 9:29AM3.89m | 10:04PM4.25m | 10:20AM4.07m | 10:44PM4.38m | |||||||
Low Tide | 10:21PM1.49m | 10:36AM1.47m | 11:48PM1.47m | 12:01PM1.48m | 1:05AM1.32m | 1:27PM1.35m | 2:11AM1.08m | 2:38PM1.11m | 3:06AM0.82m | 3:34PM0.87m | 3:54AM0.61m | 4:21PM0.69m | |||||||
 |  | |  |  | |  |  | | | | | |  | |  | | | | |
 | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — | — |
 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — |
mm | — | — | — | 14 | — | — | — | — | — | — | — | — | — | 2 | 5 | 2 | 2 | 1 | 2 |
Temp °C | 9 | 11 | 12 | 12 | 14 | 15 | 9 | 15 | 15 | 9 | 11 | 11 | 9 | 10 | 10 | 11 | 12 | 13 | 12 |
Feels °C | 7 | 9 | 10 | 10 | 12 | 13 | 7 | 13 | 13 | 8 | 9 | 9 | 8 | 9 | 9 | 11 | 12 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | N 5 | N 5 | NNW 8 | NW 18 | — | N 10 | N 9 | N 8 | N 8 | N 8 | N 8 | N 7 | N 7 | N 6 | N 8 | NW 10 | N 7 | NNW 10 | N 6 |
| kJ | 17 | 11 | 13 | 13 | — | 327 | 133 | 51 | 33 | 19 | 10 | 10 | 4 | 25 | 89 | 4 | 72 | 11 | 44 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | NNW 8 | — | — | — | NW 18 | NW 16 | NW 16 | NW 15 | ENE 3 | ENE 4 | N 19 | NW 18 | N 16 | N 12 | — | NNW 10 | N 19 | NNW 10 |
| kJ | 9 | 13 | — | — | — | 12 | 10 | 10 | 9 | 1 | 1 | 7 | 13 | 5 | 3 | — | 10 | 7 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NW 15 | N 14 | — | — | N 10 | — | — | — | — | NW 18 |
| kJ | — | — | — | — | — | — | — | — | — | 8 | 4 | — | — | 2 | — | — | — | — | 12 |
Wind waves Height (m) Direction Period (s) | — | — | N 5 | N 6 | N 10 | NNW 10 | — | — | — | — | — | — | — | — | — | N 8 | — | N 6 | — |
| kJ | — | — | 12 | 108 | 484 | 832 | — | — | — | — | — | — | — | — | — | 164 | — | 32 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 83 | 30 | 88 | 15 | 83 | 0 | 14 | 14 | 125 | 83 | 83 | 83 | 83 | 88 | 14 | 7 | 14 | 129 | 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
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