Planning a night dive
Darkness changes familiar sites and familiar signals. A night dive rewards extra preparation, redundant lights and a simple, well-rehearsed plan.
Only dive at night within your training
Night diving requires specific training and a conservative plan. Dive a site you already know in daylight where possible, stay within your experience level, and follow your instructor’s and operator’s procedures.
Preparing the dive
Choose a site you know from a daytime dive whenever you can, and review its layout, hazards and exit points before dark. Agree a simple, conservative profile with shallower depths and a shorter bottom time than you might plan by day.
Carry a primary light plus at least one backup, and check batteries and seals beforehand. Attach a glow stick or marker light to your gear so your buddy can find you even if your primary light fails.
Communicating in the dark
Agree hand and light signals before entering the water, including how to signal ‘okay’, attract attention and indicate a problem. Keep lights pointed down and away from a buddy’s eyes rather than directly at their mask.
Stay closer together than you might in daylight, since visual contact is reduced to the edge of the light beam. Settle on a simple plan for what to do if you become separated, and treat it seriously.
After entry
Move slowly and let your eyes adjust before descending quickly. Many creatures behave differently at night, so maintain careful buoyancy and keep a respectful distance from the reef or bottom.
Surface cautiously and signal the boat or shore crew with your light as arranged. A pre-agreed recall signal and a clear exit plan matter even more once the sun has set.
Dive-day checklist
Before a night dive
- Dive a known site where possible and review the layout
- Carry a primary and backup light with checked batteries
- Attach a marker light so your buddy can find you
- Agree light and hand signals before entering the water
- Plan a conservative profile and a clear exit signal
General guidance only. Follow your training, the dive operator’s procedures, and each manufacturer’s current instructions.
Ask the dive guide
Personal guidance for your next dive
Describe a dive scenario or an equipment-care question. The guide answers in your language and points you to relevant journal articles.
General educational guidance only. It is not medical advice, emergency instruction or a replacement for training, certification, manufacturer instructions, your operator's briefing or your dive plan.