For the next 24 hours, stay off the beaches, and stay out of the water - that includes swimming, surfing, boating, fishing etc. The currents and surges generated by tsunami can be very dangerous.
Police, Fire Service & Coastguard have been dispatched to clear beaches. Please follow their instructions.
If you're going to ignore their advice, you should consider writing your name and date of birth on your arm in permanent marker, it might make it easier to identify your body.