Jan’s Tunnel
The entrance to the tunnel leading into the Lost World dive site is shallow, making it ideal for both snorkelers and scuba divers who prefer to stay above the sand line at 40m. As you venture deeper, the reef gradually becomes steep and craggy, offering a unique topographical experience.
While the tunnel does support a variety of fish life, such as demoiselles, snapper, and scorpion fish, it is primarily renowned for its impressive topography and lighting. Divers with all levels of experience, from beginners to advanced, can explore this site and marvel at its captivating underwater scenery.
Located in New Zealand's Northland region, near Rikoriko Cave, this dive site offers excellent visibility of 17m. With a maximum depth of 26m, it is suitable for divers of various skill levels to enjoy. Immerse yourself in the captivating beauty of the Lost World and create unforgettable memories in the underwater realm of New Zealand.
While the tunnel does support a variety of fish life, such as demoiselles, snapper, and scorpion fish, it is primarily renowned for its impressive topography and lighting. Divers with all levels of experience, from beginners to advanced, can explore this site and marvel at its captivating underwater scenery.
Located in New Zealand's Northland region, near Rikoriko Cave, this dive site offers excellent visibility of 17m. With a maximum depth of 26m, it is suitable for divers of various skill levels to enjoy. Immerse yourself in the captivating beauty of the Lost World and create unforgettable memories in the underwater realm of New Zealand.
Diving Conditions Score for Jan’s Tunnel
5.4
AverageAverage conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Jan’s Tunnel
Depth
26m
Visibility
17m
Experience Level
beginner
advanced
Weather Conditions for Jan’s Tunnel
Wave Height
0.52m
Wind Speed
13.7 m/s
Water Temp
18.3°C
Visibility
30.24km
Cloud Cover
13%
Wave Period
7.8s
Air Temperature
13.4°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Jan’s Tunnel
Alpha
Dive Score Chart for Jan’s Tunnel
Best time to dive: 12:00 with score 8.119411764705884/10. Water conditions: Waves 0.54m, Wind 5.1 m/s.Best night dive time: 0:00 with score 7.086049469214438/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Jan’s Tunnel: 06:00
Sunset at Jan’s Tunnel: 18:00
Optimal diving conditions at Jan’s Tunnel 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.
Best Overall
12:00Score: 8.1/10
Waves: 0.54m (7.65s), Wind: 5.1 m/s
Best Night
0:00Score: 7.1/10
Waves: 0.56m, Wind: 14.5 m/s
Seasonal Analysis for Jan’s TunnelAlpha
Historical patterns and best seasons for diving at Jan’s Tunnel
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 Jan’s Tunnel
Summer
Avg. Score: 7.9/10
Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.
Best Months for Jan’s Tunnel
July
Score: 8.0
June
Score: 7.8
August
Score: 7.8
Ideal Conditions for Jan’s Tunnel
Water Temp
18.2°C / 64.8°F
March
Visibility
12.0m / 39.4ft
May
Wave Height
1.8m / 5.9ft
December
Wave Period
8.0s
January
Seasonal Insights for Jan’s Tunnel
Jan’s Tunnel follows southern hemisphere patterns with March being the warmest month (18.2°C) and October the coldest (12.3°C). The calmest conditions typically occur in December with average wave heights of 1.8m and wave periods of 8.0s. The most comfortable wave conditions are in December 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). May is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during December to February, 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 13, 2026
Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.
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