Box Jellyfish Calendar

The NOAA Tides & Currents website provides a chart of tides/water levels for their Honolulu station.
Note: This calendar is for informational purposes only. All jellyfish arrival dates are estimates. Jellyfish may be present on any day of the year. Always obey warning signs posted on beaches. Swim on guarded beaches only and ask a lifeguard about the presence of jellyfish and other ocean hazards.