Surf Forecasts:
Ruby Bay surf forecast from 6 Aug 2026:
- Best quality surf: Sunday 9 Aug, 6AM (local time) - 7.5ft (2.3m), 9s period, N swell with cross-offshore winds.
- Most powerful swell: Sunday 9 Aug, 6AM (local time) - 7.5ft (2.3m), 9s period, N swell with 787 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 6AM (local time) - 7.5ft (2.3m), 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 Sunday (Aug 09) at 6AM. The primary swell is predicted to be 2.3m 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 2.3m 9s and forecast to arrive on Sunday (Aug 09) at 6AM. 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 10s period and expected on Sunday (Aug 09) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 9th Aug) | 7.5ft (2.3m) 9s |
| Best Surf | 6AM (Sun 9th Aug) | 7.5ft (2.3m) 9s |
| Most Powerful | 6AM (Sun 9th Aug) | 7.5ft (2.3m) 9s |
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 cooking for our little corner of the world.
Honestly, for the first few days, it’s a bit of a flat spell. Ruby Bay is a point break that rarely breaks at the best of times, and this outlook is a real test of patience. We’ve got a long stretch from now right through the first week of August with nothing to get excited about. The swell is tiny, the energy is basically non-existent. You’re looking at a whole lot of glassy, calm water, but no surf to speak of. It’s a tough run.
Then, finally, things start to show a pulse on Sunday morning, the 9th of August. That’s the first real glimmer. The wind will be glassy, and a north swell pushes in at 6ft. The combined energy jumps to a solid 568 (moderate wave energy), which is the biggest number we’ve seen by a long shot. The period is 9 seconds, so it’s a decent, workable groundswell. For a break that’s as sheltered as Ruby Bay, this is your standout. It’s the closest thing to a proper session. Just be aware, it’s not a guaranteed ripper, and the swell direction is from the north, which is not quite the optimum for this spot, so it might be a little lumpy. The water temp is about average for this time of year, nothing wild.
After that Sunday morning window, the energy drops right back off. Monday the 10th and Tuesday the 11th see us back in the doldrums with clean but tiny surf. The 14th and 15th of August offer a bit more hope, with the swell picking up again on the 15th to 4ft from the north, with a long period of 12 seconds and combined energy of 416 (moderate). The wind is offshore from the SSW, which should keep it clean. It’s a promising session for the second week, but we’re talking over a week away, so take it with a pinch of salt. After that, the forecast just dies off again. A lot of blank days for a spot that rarely breaks anyway.
So, the pick of the bunch is hands-down Sunday morning, the 9th of August. That’s your best bet. The 15th of August is a decent long-range whisper, but don’t book the day off work just yet.
Rusty.
Short Range ForecastHeavy rain (total 43mm), heaviest during Sat night. Very mild (max 14°C on Sun afternoon, min 3°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue night. Very mild (max 15°C on Mon afternoon, min 6°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 11 | N 11 | NW 4 | NW 5 | N 5 | N 5 | N 6 | N 9 | N 10 | N 10 | N 9 | N 9 | N 8 | N 8 | N 8 | N 7 | N 7 | N 6 | N 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 3 | 3 | 15 | 39 | 0 | 27 | 154 | 568 | 320 | 145 | 80 | 56 | 35 | 20 | 10 | 51 | 45 | 27 | 40 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | glassy | glassy | glassy | on | on | glassy | cross-on | off | off | glassy | glassy | glassy | glassy | glassy | glassy | on | glassy |
High Tide | 3:32AM3.55m | 3:56PM3.38m | 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 | |||||||
Low Tide | 9:24AM1.34m | 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 | ||||||||
 |  |  |  | | |  |  |  | | | |  | | |  | | | | |
 | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — |
 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — |
mm | — | — | — | — | — | — | 37 | 6 | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 5 | 8 | 10 | 9 | 12 | 12 | 11 | 12 | 14 | 8 | 14 | 15 | 8 | 11 | 11 | 8 | 12 | 12 | 8 |
Feels °C | 3 | 5 | 7 | 7 | 11 | 10 | 8 | 11 | 12 | 5 | 11 | 13 | 7 | 10 | 10 | 6 | 10 | 10 | 6 |
Swell 1 Height (m) Direction Period (s) | — | — | NNW 4 | N 5 | N 5 | — | NW 18 | N 9 | N 10 | N 10 | N 9 | N 9 | N 8 | N 8 | N 8 | N 7 | N 7 | N 6 | N 8 |
| kJ | — | — | 7 | 11 | 17 | — | 13 | 568 | 320 | 145 | 80 | 56 | 35 | 20 | 10 | 51 | 45 | 27 | 40 |
Swell 2 Height (m) Direction Period (s) | N 11 | N 11 | NNW 11 | NNW 10 | NNW 8 | — | — | — | NW 18 | NW 16 | NW 16 | NW 15 | NW 15 | N 14 | ENE 3 | ENE 4 | NW 12 | NNW 12 | NNW 11 |
| kJ | 3 | 3 | 12 | 9 | 14 | — | — | — | 12 | 10 | 10 | 9 | 8 | 4 | 1 | 1 | 6 | 26 | 42 |
Swell 3 Height (m) Direction Period (s) | — | N 11 | N 11 | — | — | — | — | — | — | — | — | — | N 18 | — | NE 4 | N 18 | N 17 | N 9 | — |
| kJ | — | 2 | 2 | — | — | — | — | — | — | — | — | — | 6 | — | 1 | 6 | 6 | 7 | — |
Wind waves Height (m) Direction Period (s) | — | — | NW 4 | NW 5 | — | N 5 | N 6 | NNW 10 | — | — | — | NNE 2 | ENE 4 | ENE 3 | — | — | — | — | — |
| kJ | — | — | 15 | 39 | — | 27 | 154 | 1106 | — | — | — | 1 | 3 | 2 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 83 | 83 | 83 | 14 | 28 | 116 | 83 | 0 | 83 | 7 | 14 | 125 | 14 | 83 | 88 | 14 | 14 | 28 | 14 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ruby Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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
Nearest