Grottos
With a visibility of 19 meters and a maximum depth of 14 meters, Nananu Passage promises an unforgettable underwater adventure suitable for both beginners and advanced divers. Optimal diving conditions can be enjoyed during the incoming tide. This exceptional dive site is situated in the Vatulaca Reef region, just north of Volivoli Beach Resort. Whether you're a novice or an experienced diver, this area offers an array of remarkable dive sites tailored to cater to all interests and skill levels. Depending on your chosen site and the tide height, you can reach the dive location with a short 15 to 25-minute boat ride from the resort.
Prepare to delve into the depths, respect the ocean, and immerse yourself in the wonders of the underwater world at divechamp.com.
Diving Conditions Score for Grottos
Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Grottos
Depth
14m
Visibility
19m
Experience Level
Weather Conditions for Grottos
Wave Height
0.2m
Wind Speed
11.4 m/s
Water Temp
25.7°C
Visibility
43.64km
Cloud Cover
20%
Wave Period
6.75s
Air Temperature
22.3°C
Precipitation
0 mm
Dive Score Chart for Grottos
Best time to dive: 6:00 with score 9.446666666666665/10. Water conditions: Waves 0.32m, Wind 2.4 m/s.Best night dive time: 23:00 with score 8.609316438356165/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Grottos 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: 9.4/10
Waves: 0.32m (5s), Wind: 2.4 m/s
Score: 8.6/10
Waves: 0.18m, Wind: 6 m/s
Seasonal Analysis for GrottosAlpha
Historical patterns and best seasons for diving at Grottos
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 Grottos
Summer
Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.
Best Months for Grottos
Ideal Conditions for Grottos
Water Temp
25.8°C / 78.4°F
April
Visibility
12.0m / 39.4ft
June
Wave Height
1.7m / 5.6ft
December
Wave Period
8.0s
January
Seasonal Insights for Grottos
Grottos follows southern hemisphere patterns with April being the warmest month (25.8°C) and October the coldest (22.4°C). The calmest conditions typically occur in December with average wave heights of 1.7m 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). June 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 - Jul 9, 2026