The union Prospect are in dispute with the Government over a pay freeze policy.
Union members want the Met Office to be allowed to pay the market rate to attract top people.
Staff will walk out at 2pm and set up picket lines for a three-hour protest.
However the union say weather services with implications for national security or public safety will not be affected.
Deaths of man and woman in two counties being linked
Woman found dead in Torquay; man in Hampshire
Dawlish's black swan lose nests in floods
At least 10 eggs washed away
Trains cancelled as flood damage continues
Divers to inspect infrastructure
Torbay tourism facing pressures
Bay MP says tourist trade needs stability and help
What is the future of vulnerable but vital Slapton Line?
Millions of pounds have already been spent protecting the road
Reform win Brixham by-election
Very small turn out
