Riff1  F
I think there are two guitars:
The first playing the bass F# and the second positioned xx3211 playing the high notes on G, B and E strings

E |------------------------------------1--------------|
B |------------------------------1---4---1------------|
G |-------------------3-2----2-3-----------3-2--------|
D |---3---3---3---3-----------------------------------|
A |---------------------------------------------------|
E |-1---1---1---1---1---------------------------------|


Verse (F with Riff1)
Riptide pulls me out into the open sea
My toes dangle for a place to stand and be

Chorus (Eb  F  C#  Bb  F)
Eb                                  F (G: 2 3 B:1 G:3 2)
Oh starry night come and chart a course
     C#     
Or send me a boat with an anchor set 
         Bb    
I'll pull myself
F
Ashore

Verse (F with Riff1)
Left with essence 
Of the moon and stars and night

There's no other route
I cannot take self to flight

Bridge (Eb  F) 
Eb
I'll float here with the shrimp and brine
And on my cheeks and hair
                F
The salt will always shine
Eb
And with this phosphorescence map
A sailor's chart a mermaid's hand 
            F
Something I'll find

Chorus (Eb  F  C#  Bb  F)