The presence of the coming El Niño is being blamed after multiple poisonous sea snakes washed up on the shores of a Southern California beach this week for the first time in about 30 years.

A few yellow-bellied sea snakes, which have highly poisonous venom and usually call warm tropical waters home, washed up at high tide at Silver Strand Beach in Oxnard.

A descendant of Australian tiger snakes, experts believe the arrival of the sea snake is a harbinger of El Niño because the last time it appeared in California was during the weather system in the '80s.

A few yellow-bellied sea snakes washed up at the high tide line at Silver Strand Beach in Oxnard, California

Yellow-bellied snakes have highly poisonous venom and their bites can be fatal to humans, but they are rare

Experts theorize El Niño has allowed the sea snakes to get to California by riding warming ocean currents

The snake sightings were noted on a blog for Heal the Bay, and the organization asked members of the public to avoid handling the snake and instead note the location and take photos.

Yellow-bellied bites can be fatal to humans, but they are rare, the LA Daily News reported.

Heal the Bay marine scientist Dana Murray said: 'It's very unusual.

'It's only when we have these warming ocean events that they come into California.

'They're highly venomous.

'But at the same time, they're not very aggressive to humans.

'Don't get too close. Take pictures. Note their location. And report it.'

Heal the Bay is asking members of the public to note the location and take photos if they find a snake

The organization has theorized that the onset of El Niño has allowed the sea snakes to get to California by riding warm ocean currents across the Pacific and Indian Oceans.

A yellow-bellied snake that was captured on Friday died after it was taken to the US Fish and Wildlife Service’s office, the LA Times reported.

Greg Pauly, the herpetology curator at the Natural History Museum of Los Angeles County, indicated it was rare to see one of the snakes washed up on a beach.