This is a really neat poem!  Thanks for posting it.  Poetry is always a little trickier for me to transcribe because the rules and customs of context in poetry are VERY flexible.  But that's what makes for a more challenging transcription!  Here's my attempt below, let me know if I missed anything.

"High Tide"
by Winifred Welles

High on my hill, I watched the tide come in,
Laying its blue tiles in a broken tomb
Over the skeletons of sand, over the bones
Of rocks and wharves, wreathing the long graves
With griefless hands and stodgy, happy voices.

From where I look I can see, going over
All ugliness of death, all that is lost
or drift.  Whichever way I turn from here
I can see life and beauty rising, sighing,
taking hold and making safe.  The dream comes true
And all the little promises of pools are kept!

Inward the tide is surely coming;
Lifting the draggled weeds beneath the shells,
Lifting the shells beneath the anchored boats,
Lifting the boats — inward, even to hills,
Upward, even to me, lifting my hands
Along the sky, setting my hair afloat
Until my heart swings free, my tears spill over,
And I can bear no more — the tide is high.