Lake Rotoma
Lake Rotomā was formed within the Rotomā caldera when lava flows from a massive crater eruption blocked its outlet around 9,500 years ago. The lake is home to a thriving population of Koura, some of the largest you'll ever see. Please note that these creatures are protected, so admire them from a distance. Additionally, you may also encounter brown and rainbow trout during your dive.
While the parking area is small and there are no toilet facilities, you'll find a tarmac area to conveniently set up your equipment. The shore entry is easy, with a stone pathway leading you into the water, gradually descending to a depth of 7 meters. Generally, the water clarity is good, although there might be some silt beyond 7 meters. Navigating the site is straightforward, and you can enter from both the left and right sides. For those interested, there is a small boat wreck to explore at approximately 10 meters depth. On the southern side, there is a tie-off point at around 6 meters for your flag and float.
With a maximum depth of 13 meters and visibility reaching up to 6 meters, this dive site caters to both beginner and advanced divers. Located near State Highway 30, our site offers easy access for divers in the Rotorua and Bay of Plenty areas.
Come and explore the underwater wonders of Lake Rotomā. Whether you're a beginner or an experienced diver, this site has something to offer. Don't miss out on the opportunity to dive in this beautiful New Zealand location.
Diving Conditions Score for Lake Rotoma
Average conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Lake Rotoma
Depth
13m
Visibility
6m
Experience Level
Weather Conditions for Lake Rotoma
Wave Height
1m
Wind Speed
6.2 m/s
Water Temp
18°C
Visibility
43.5km
Cloud Cover
19%
Wave Period
8s
Air Temperature
7.7°C
Precipitation
0 mm
Dive Score Chart for Lake Rotoma
Best time to dive: 6:00 with score 7.385433333333332/10. Water conditions: Waves 1m, Wind 5 m/s.Best night dive time: 5:00 with score 6.917133333333333/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Lake Rotoma are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.
Score: 7.4/10
Waves: 1m (8s), Wind: 5 m/s
Score: 6.9/10
Waves: 1m, Wind: 4.8 m/s
Seasonal Analysis for Lake RotomaAlpha
Historical patterns and best seasons for diving at Lake Rotoma
The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.
Monthly Dive Score Analysis - Seasonal Diving Conditions
Higher values indicate better diving conditions
Seasonal DiveScore Chart
This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.
Higher values indicate better diving conditions
Best Season for Lake Rotoma
Summer
Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.
Best Months for Lake Rotoma
Ideal Conditions for Lake Rotoma
Water Temp
14.8°C / 58.6°F
January
Visibility
15.5m / 50.9ft
January
Wave Height
0.7m / 2.3ft
February
Wave Period
8.0s
January
Seasonal Insights for Lake Rotoma
Lake Rotoma follows southern hemisphere patterns with January being the warmest month (14.8°C) and September the coldest (7.7°C). The calmest conditions typically occur in February with average wave heights of 0.7m and wave periods of 8.0s. The most comfortable wave conditions are in February with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). January is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during February to April, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.
Last updated: 1 min. ago - Jun 18, 2026